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Note: This page contains sample records for the topic "led general lighting" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


1

Light Emitting Diodes (LEDs) for General Illumiation  

NLE Websites -- All DOE Office Websites (Extended Search)

LIGHT LIGHT EMITTING DIODES (LEDS) FOR GENERAL ILLUMINATION AN OIDA TECHNOLOGY ROADMAP An OIDA Report March 2001 Co-Sponsored by DOE/BTS and OIDA Compiled by Eric D. Jones Sandia National Laboratories OIDA Member Use Only OIDA OPTOELECTRONICS INDUSTRY DEVELOPMENT ASSOCIATION 1133 Connecticut Avenue, NW Suite 600 Washington, DC 20036 Ph: (202) 785-4426 Fax: (202) 785-4428 Web: http://www.OIDA.org © 2001 OIDA Optoelectronics Industry Development Association All data contained in this report is proprietary to OIDA and may not be distributed in either original or reproduced form to anyone outside the client's internal organization within five years of the report date without prior written permission of the Optoelectronics Industry Development Association. Published by: Optoelectronics Industry Development Association

2

Integrated LED-based luminare for general lighting  

DOE Patents (OSTI)

Lighting apparatus and methods employing LED light sources are described. The LED light sources are integrated with other components in the form of a luminaire or other general purpose lighting structure. Some of the lighting structures are formed as Parabolic Aluminum Reflector (PAR) luminaires, allowing them to be inserted into conventional sockets. The lighting structures display beneficial operating characteristics, such as efficient operation, high thermal dissipation, high output, and good color mixing.

Dowling, Kevin J.; Lys, Ihor A.; Roberge, Brian; Williamson, Ryan C.; Roberts, Ron; Datta, Michael; Mollnow, Tomas; Morgan, Frederick M.

2013-03-05T23:59:59.000Z

3

LED Lighting Facts  

Energy.gov (U.S. Department of Energy (DOE))

DOE's LED Lighting Facts® program showcases LED products for general illumination from manufacturers who commit to testing products and reporting performance results according to industry standards. For lighting buyers, designers, and energy efficiency programs, the program provides information essential to evaluating SSL products.

4

Solid-State Lighting: LED Lighting Facts  

NLE Websites -- All DOE Office Websites (Extended Search)

Market-Based Programs Printable Version Share this resource Send a link to Solid-State Lighting: LED Lighting Facts to someone by E-mail Share Solid-State Lighting: LED Lighting Facts on Facebook Tweet about Solid-State Lighting: LED Lighting Facts on Twitter Bookmark Solid-State Lighting: LED Lighting Facts on Google Bookmark Solid-State Lighting: LED Lighting Facts on Delicious Rank Solid-State Lighting: LED Lighting Facts on Digg Find More places to share Solid-State Lighting: LED Lighting Facts on AddThis.com... LED Lighting Facts CALiPER Program Standards Development Technical Information Network Gateway Demonstrations Municipal Consortium Design Competitions LED Lighting Facts LED lighting facts - A Program of the U.S. DOE DOE's LED Lighting Facts® program showcases LED products for general

5

An Efficient LED System-in-Module for General Lighting Applications  

SciTech Connect

The objective of the project was to realize an LED-based lighting technology platform for general illumination, starting with LED chips, and integrating the necessary technologies to make compact, user-friendly, high-efficiency, energy-saving sources of controlled white (or variable-colored) light. The project is to build the system around the LEDs, and not to work on the LEDs themselves, in order that working products can be introduced soon after the LEDs reach suitable efficiency for mass-production of high-power light sources for general illumination. Because the light sources are intended for general illumination, color must be accurately maintained, requiring feedback control in the electronics. The project objective has been realized and screw base demonstrators, based on the technology developed in the project, have been built.

None

2008-09-14T23:59:59.000Z

6

Cree LED Lighting Solutions Formerly LED Lighting Fixtures LLF...  

Open Energy Info (EERE)

LED Lighting Solutions Formerly LED Lighting Fixtures LLF Jump to: navigation, search Name: Cree LED Lighting Solutions (Formerly LED Lighting Fixtures (LLF)) Place: Morrisville,...

7

Modeling LED street lighting  

Science Journals Connector (OSTI)

LED luminaires may deliver precise illumination patterns to control light pollution, comfort, visibility, and light utilization efficiency. Here, we provide simple equations to...

Moreno, Ivan; Avendańo-Alejo, Maximino; Saucedo-A, Tonatiuh; Bugarin, Alejandra

2014-01-01T23:59:59.000Z

8

Solid-State Lighting: Using LEDs  

NLE Websites -- All DOE Office Websites (Extended Search)

Using LEDs to someone by E-mail Using LEDs to someone by E-mail Share Solid-State Lighting: Using LEDs on Facebook Tweet about Solid-State Lighting: Using LEDs on Twitter Bookmark Solid-State Lighting: Using LEDs on Google Bookmark Solid-State Lighting: Using LEDs on Delicious Rank Solid-State Lighting: Using LEDs on Digg Find More places to share Solid-State Lighting: Using LEDs on AddThis.com... Why SSL LED Basics OLED Basics Using LEDs R&D Challenges Market Challenges Using LEDs Resources Using LEDs to Their Best Advantage PDF Establishing LED Equivalency PDF LED Directional Lamps LED MR16 Lamps Recessed LED Downlights PDF General Service LED Lamps What to Ask - A Checklist for Buyers of LED Lighting Products More Resources With their unique design and performance characteristics-such as directional light emission, compact profile, superior optical control,

9

General Service LED Lamps | Department of Energy  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

DOE SSL technology fact sheet that compares general service LED light bulbs with incandescent and CFL bulbs. ledgeneral-service-lamps.pdf More Documents & Publications LED...

10

LED Lighting | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

LED Lighting LED Lighting LED Lighting July 29, 2012 - 4:43pm Addthis LED Lighting What are the key facts? Quality LED products can last 25 times longer than an incandescent bulb and use 75% less energy. LEDs are directional, focusing light in ways that are useful in homes and commercial settings. The light-emitting diode (LED) is one of today's most energy-efficient and rapidly-developing lighting technologies. Quality LED light bulbs last longer, are more durable, and offer comparable or better light quality than other types of lighting. Check out the top 8 things about LEDs to learn more. Energy Savings LED is a highly energy efficient lighting technology, and has the potential to fundamentally change the future of lighting in the United States. Residential LEDs -- especially ENERGY STAR rated products -- use at least

11

Metacapacitors for LED Lighting: Metacapacitors  

SciTech Connect

ADEPT Project: The CUNY Energy Institute is developing less expensive, more efficient, smaller, and longer-lasting power converters for energy-efficient LED lights. LEDs produce light more efficiently than incandescent lights and last significantly longer than compact fluorescent bulbs, but they require more sophisticated power converter technology, which increases their cost. LEDs need more sophisticated converters because they require a different type of power (low voltage direct current, or DC) than what's generally supplied by power outlets. The CUNY Energy Institute is developing sophisticated power converters for LEDs that contain capacitors made from new, nanoscale materials. Capacitors are electrical components that are used to store energy. CUNY's unique capacitors are configured with advanced power circuits to more efficiently control and convert power to the LED lighting source. They also eliminate the need for large magnetic components, instead relying on networks of capacitors that can be easily printed on plastic substrate. CUNY's prototype LED power converter already meets DOE's 2020 projections for the energy efficiency of LED power converters.

None

2010-09-02T23:59:59.000Z

12

Development of Advanced Manufacturing Methods for Warm White LEDs for General Lighting  

SciTech Connect

GE Lighting Solutions will develop precise and efficient manufacturing techniques for the “remote phosphor” platform of warm-white LED products. In volume, this will be demonstrated to drive significant materials, labor and capital productivity to achieve a maximum possible 53% reduction in overall cost. In addition, the typical total color variation for these white LEDs in production will be well within the ANSI bins and as low as a 4-step MacAdam ellipse centered on the black body curve. Achievement of both of these objectives will be demonstrated while meeting a performance target of > 75 lm/W for a warm-white LED and a reliability target of <30% lumen drop / <2-step MacAdam ellipse shift, estimated over 50,000 hrs.

Deshpande, Anirudha; Kolodin, Boris; Jacob, Cherian; Chowdhury, Ashfaqul; Kuenzler, Glenn; Sater, Karen; Aesram, Danny; Glaettli, Steven; Gallagher, Brian; Langer, Paul; Setlur, Anant; Beers, Bill

2012-03-31T23:59:59.000Z

13

Sandia National Laboratories: efficient LED lighting  

NLE Websites -- All DOE Office Websites (Extended Search)

efficient LED lighting ECIS-Veeco: Research Driving Down the Costs of Efficient LED Lighting On February 14, 2013, in Energy, Energy Efficiency, Materials Science, Partnership,...

14

Considerations When Comparing LED and Conventional Lighting  

Energy.gov (U.S. Department of Energy (DOE))

When comparing LED lighting performance to conventional lighting, buyers will want to consider energy efficiency, operating life and lumen depreciation, light output/distribution, color quality,...

15

LED Lighting Basics | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

LED Lighting Basics LED Lighting Basics LED Lighting Basics August 16, 2013 - 10:07am Addthis Light-emitting diodes (LEDs) are light sources that differ from more traditional sources of light in that they are semiconductor devices that produce light when an electrical current is applied. Applying electrical current causes electrons to flow from the positive side of a diode to the negative side. Then, at the positive/negative junction of the diode, the electrons slow down to orbit at a lower energy level. The electrons emit the excess energy as photons of light. LEDs are often used as small indicator lights on various electronic devices. Because of their long life, durability, and efficiency, LEDs are becoming more common in residential, commercial, and outdoor area lighting

16

LED Lighting Value and Opportunities CONFIDENTIAL  

E-Print Network (OSTI)

LED Lighting ­ Value and Opportunities Paul Fini CREE SBTC CONFIDENTIAL #12;2 Copyright © 2013, Cree Inc. · By now, superior LED efficiency in any application, 10+ year reliability, and high light/yr #12;Copyright © 2013, Cree Inc. 4 LEDs in Various Applications · SSL: requirements vary widely

California at Davis, University of

17

LED Street Lighting Conversion Workshop Presentations  

Energy.gov (U.S. Department of Energy (DOE))

This page provides links to the presentations given at the National League of Cities Mobile Workshop, LED Street Lighting Conversion: Saving Your Community Money, While Improving Public Safety,...

18

Financing Guidance for LED Street Lighting Programs  

Energy.gov (U.S. Department of Energy (DOE))

Financing an LED street lighting replacement program can present a hurdle for many system owners, even if the planned transition offers very favorable economics. Replacing the existing system requires a significant budget, particularly as the scope of the program increases. Cities such as Los Angeles and Seattle have invested many millions of dollars into their (very successful) LED street lighting replacement programs.

19

Smart Lighting: LED Implementation and Ambient Communication Applications  

E-Print Network (OSTI)

Smart Lighting: LED Implementation and Ambient Communication Applications by Nicholas Adrian Galano............................................................................................................................................1 LED Implementation..........................................................................................................................2 LED Energy Usage

Agogino, Alice M.

20

Zero net power LED lighting system design  

Science Journals Connector (OSTI)

Although the natural circuitry for LED is DC, LED lighting system design has been restricted to match the supply requirements of AC power from the grid. The DC converter circuit on each LED light fitting is not only energy inefficient, it is also the most unreliable element in the lighting system. In a pilot research project to investigate the feasibility of DC lighting systems, an innovative approach has been taken to re-design the lighting circuit in DC mode using existing AC wiring. The intelligent control system manages power supply between a bank of batteries, solar power or grid power back up. The batteries are charged when solar power is available. Further improvement of the circuit control using pulse width modulation operation modes has been demonstrated. Experiments showed that the new LED lighting system was able to deliver 65% total energy reduction.

John P.T. Mo; Ganesh Sen

2013-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "led general lighting" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


21

Pittsburgh LED Street Lighting Research Project Performance Criteria  

Energy.gov (U.S. Department of Energy (DOE))

A Pittsburgh LED Street Lighting Research Project document on Technical and Aesthetic Performance for Business District LED Lighting.

22

Solid-State Lighting: Municipal Consortium LED Street Lighting Workshop  

NLE Websites -- All DOE Office Websites (Extended Search)

Los Angeles, CA to someone Los Angeles, CA to someone by E-mail Share Solid-State Lighting: Municipal Consortium LED Street Lighting Workshop Presentations and Materials-Los Angeles, CA on Facebook Tweet about Solid-State Lighting: Municipal Consortium LED Street Lighting Workshop Presentations and Materials-Los Angeles, CA on Twitter Bookmark Solid-State Lighting: Municipal Consortium LED Street Lighting Workshop Presentations and Materials-Los Angeles, CA on Google Bookmark Solid-State Lighting: Municipal Consortium LED Street Lighting Workshop Presentations and Materials-Los Angeles, CA on Delicious Rank Solid-State Lighting: Municipal Consortium LED Street Lighting Workshop Presentations and Materials-Los Angeles, CA on Digg Find More places to share Solid-State Lighting: Municipal Consortium

23

DOE Lighting Program Update: LED Validation Activities | Department...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

DOE Lighting Program Update: LED Validation Activities DOE Lighting Program Update: LED Validation Activities Presentation covers the DOE Lighting Program update and is given at...

24

#AskEnergySaver: LED Lights | Department of Energy  

Energy Savers (EERE)

LED Lights AskEnergySaver: LED Lights April 24, 2014 - 6:00pm Addthis LED lights are six to seven times more energy efficient than conventional incandescent lights, cut energy use...

25

DOE Lighting Program Update: LED Validation Activities  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

DOE Lighting Program Update DOE Lighting Program Update LED Validation Activities Kelly Gordon Pacific Northwest National Laboratory Federal Utility Partnership Working Group April 15, 2010 Providence, RI www.ssl.energy.gov 2 | Solid-State Lighting Program Legislative Mandate The DOE is directed by U.S. government policy (EPACT 2005, Section 912) to: "...support research, development, demonstration, and commercial application activities related to advanced solid-state lighting technologies based on white light emitting diodes." DOE Lighting Program www.ssl.energy.gov 3 | Solid-State Lighting Program SSL Energy Saving Potential By 2030: * Potential to cut U.S. lighting electricity use by 25% * Cumulative energy savings: $120 billion * Annual energy savings equivalent to:

26

ECE 466: LED Lighting Systems -Incandescent lightings rise and  

E-Print Network (OSTI)

versus cost - Power Electronic Drives for CFL and LED light sources to achieve dimmable operation - Basic electric AC and DC circuits at Sophomore level or equivalents Absolutes Lighting System Requirements index as a metric of a light source - Power Electronic Energy sources driving light sources in a compact

Schumacher, Russ

27

Sustainable LED Fluorescent Light Replacement Technology  

SciTech Connect

Ilumisys and the National Center for Manufacturing Sciences (NCMS) partnered on a three-year project awarded by the United States (U.S.) Department of Energy (DOE), to quantify the impacts of LED lamps, incandescent lamps and fluorescent benchmark lamps over a product lifecycle – i.e. to develop a sustainable design and manufacturing strategy that addresses product manufacturing, use, recycling and disposal scenarios for LED-based lighting. Based on the knowledge gained from extensive product tear-down studies of fluorescent and screw-in lighting products, lifecycle assessment tools, and accelerated lifecycle testing protocols, an interactive Sustainable LED Design Guide has been developed to aid architectural and lighting designers and engineers in making design decisions that consider three important environmental impacts (greenhouse gas emissions, energy use and mercury emission) across all phases of the life of an LED lighting product. Critical information developed for the lifecycle analysis and product feature comparisons is the useful life of the lighting product as well as its performance. The Design Guide is available at www.ncms.org, and was developed based on operational and durability testing of a variety of lighting products including power consumption, light output, and useful life of a lamp in order to allow a more realistic comparison of lamp designs. This report describes the main project tasks, results and innovative features of the lifecycle assessment (LCA)-based design tools, and the key considerations driving the sustainable design of LED lighting systems. The Design Guide incorporates the following three novel features for efficiently evaluating LED lighting features in value-chains: • Bill-of-Materials (BOM) Builder – Designers may import process data for each component and supply functional data for the product, including power, consumption, lumen output and expected useful life. • Environmental Impact Review – Designs are comparable across lifecycle phases, subsystems, and environmental impact category, and can be normalized to a userdefined functional unit. • Drill-down Review – These provide an indepth look at individual lamp designs with the ability to review across subsystem or lifecycle phase.

None

2011-06-30T23:59:59.000Z

28

SciTech Connect: Demonstration Assessment of LED Roadway Lighting...  

Office of Scientific and Technical Information (OSTI)

Demonstration Assessment of LED Roadway Lighting: Philadelphia, PA Citation Details In-Document Search Title: Demonstration Assessment of LED Roadway Lighting: Philadelphia, PA...

29

New and Underutilized Technology: Airfield LED Lighting | Department of  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Technology: Airfield LED Lighting Technology: Airfield LED Lighting New and Underutilized Technology: Airfield LED Lighting October 7, 2013 - 8:57am Addthis The following information outlines key deployment considerations for airfield LED lighting within the Federal sector. Benefits Airfield LED lighting is a good application for colored LED lights since the LED is monochromatic. Reduced maintenance costs dramatically improve economics over existing incandescent. Application Airfield LED lighting is applicable at airports as wells military and domestic air stations and bases. Key Factors for Deployment Federal agencies must determine Federal Aviation Administration (FAA) approval requirements before deployment. Ranking Criteria Federal energy savings, cost-effectiveness, and probability of success are

30

LED Traffic Lights Get Buy American Stamp | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

LED Traffic Lights Get Buy American Stamp LED Traffic Lights Get Buy American Stamp November 30, 2010 - 10:19am Addthis Red. Yellow. Green. What LED traffic signals don't say: Made...

31

Getting Ready for LEDs: LED Lighting Video Series Explains the Basics |  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

for LEDs: LED Lighting Video Series Explains the for LEDs: LED Lighting Video Series Explains the Basics Getting Ready for LEDs: LED Lighting Video Series Explains the Basics November 26, 2012 - 3:09pm Addthis Part 1 of the ElectricTV.net video series. Part 2 of the ElectricTV.net video series. Roland Risser Roland Risser Program Director, Building Technologies Office How can I participate? Learn more about the advantages and accessiblity of LED lighting from this series of videos. If you haven't been down the lighting aisle of your favorite home improvement store lately, you may be surprised at how many LED lighting products have arrived. Solid-state lighting (LEDs are one type) will soon have a strong impact on how buildings and homes are lit, in part because of its potential to reduce U.S. lighting energy usage by nearly one half.

32

New and Underutilized Technology: Interior LED/Solid State Lighting |  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Interior LED/Solid State Lighting Interior LED/Solid State Lighting New and Underutilized Technology: Interior LED/Solid State Lighting October 4, 2013 - 4:53pm Addthis The following information outlines key deployment considerations for interior LED/solid state lighting within the Federal sector. Benefits Interior LED retrofits are currently viable for down lights, track lighting, sconces, and both line and low voltage task lighting. Replacements for incandescent A-lamps have also been improving rapidly. Replacements for fluorescent tube lighting may be viable for high-cost maintenance areas. Application Interior LED/solid state lighting is a rapidly improving technology currently most applicable for down lights, track lights, task lighting, accenting, high ceiling, and high cost maintenance areas.

33

New and Underutilized Technology: Exterior LED/Solid State Lighting |  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Exterior LED/Solid State Lighting Exterior LED/Solid State Lighting New and Underutilized Technology: Exterior LED/Solid State Lighting October 4, 2013 - 4:55pm Addthis The following information outlines key deployment considerations for exterior LED/solid state lighting within the Federal sector. Benefits LED lighting economics can work in high electric cost areas with high hours of use. Pricing continually decreases for LED lighting. This technology provides quality, white, even lighting with good color rendition. Greater cost savings can be achieved when combined with bi-level motion sensors to reduce light levels in parking areas, garages, and walkways. Application Exterior LED/solid state lighting is applicable in areas where security and visual performance are critical, including street lighting, parking lots,

34

Article Published on LED Lumen Maintenance and Light Loss Factors...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Article Published on LED Lumen Maintenance and Light Loss Factors Article Published on LED Lumen Maintenance and Light Loss Factors January 20, 2014 - 12:00am Addthis An article...

35

DOE Publishes Report on Color Stability of LED Lighting Products...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Color Stability of LED Lighting Products DOE Publishes Report on Color Stability of LED Lighting Products October 24, 2013 - 12:00am Addthis The U.S. Department of Energy (DOE) has...

36

Sunlight and LED Hybrid Illumination in Indoor Lighting Design  

Science Journals Connector (OSTI)

We design a light integrating collector that can collect the sunlight and LED light to illuminate the indoor spaces uniformly, and then use in simulating the sunlight/LED hybrid...

Sun, Wen-Shing; Tsuei, Chih-Hsuan

37

Flexible LEDs bring light to fingertips Oct 19, 2010  

E-Print Network (OSTI)

Flexible LEDs bring light to fingertips Oct 19, 2010 Glowing gloves Light-emitting diodes ­ or LEDs and colleagues have exploited a new printing technique for forming arrays of incredibly small red LEDs on flexible substrates. Like conventional LED manufacture, device fabrication begins by depositing a stack

Rogers, John A.

38

Text-Alternative Version: Evaluating LED Street Lighting Solutions  

Energy.gov (U.S. Department of Energy (DOE))

Below is the text-alternative version of the Evaluating LED Street Lighting Solutions webcast, held July 20, 2010.

39

Which LED Lighting Products Would You Consider Trying? | Department of  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Which LED Lighting Products Would You Consider Trying? Which LED Lighting Products Would You Consider Trying? Which LED Lighting Products Would You Consider Trying? August 5, 2010 - 7:30am Addthis On Monday, Chris discussed his upcoming project to replace the lighting in his kitchen and family room. Chris is considering LED (light-emitting diode) lighting, especially for his kitchen, where they can be installed under the cabinets. LEDs can also be used for other applications, including task lighting, recessed downlights, and holiday lighting. Which LED lighting products would you consider trying? Or, if you're already using LEDs, what do you think of them? Each Thursday, you have the chance to share your thoughts on a question about energy efficiency or renewable energy for consumers. Please comment with your answers, and also feel free to respond to other comments.

40

New and Underutilized Technology: High Bay LED Lighting | Department of  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

High Bay LED Lighting High Bay LED Lighting New and Underutilized Technology: High Bay LED Lighting October 7, 2013 - 8:55am Addthis The following information outlines key deployment considerations for high bay LED lighting within the Federal sector. Benefits LED light sources offer several potential benefits compared to metal halide or fluorescent lighting, including reduced energy consumption due to the ability to provide a more precise light distribution; longer operating life and lower maintenance requirements; less heat introduced into the space; and greater controllability for dimming and on/off control. Relevant to the cold storage application, LED performance improves in colder temperatures. Application High bay LED lighting is applicable for facilities containing high bay

Note: This page contains sample records for the topic "led general lighting" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


41

Solid-State Lighting: Text-Alternative Version: LED Essentials -  

NLE Websites -- All DOE Office Websites (Extended Search)

Essentials - Technology, Applications, Advantages, Disadvantages to someone Essentials - Technology, Applications, Advantages, Disadvantages to someone by E-mail Share Solid-State Lighting: Text-Alternative Version: LED Essentials - Technology, Applications, Advantages, Disadvantages on Facebook Tweet about Solid-State Lighting: Text-Alternative Version: LED Essentials - Technology, Applications, Advantages, Disadvantages on Twitter Bookmark Solid-State Lighting: Text-Alternative Version: LED Essentials - Technology, Applications, Advantages, Disadvantages on Google Bookmark Solid-State Lighting: Text-Alternative Version: LED Essentials - Technology, Applications, Advantages, Disadvantages on Delicious Rank Solid-State Lighting: Text-Alternative Version: LED Essentials - Technology, Applications, Advantages, Disadvantages on Digg

42

Solid-State Lighting: DOE Hosts LED Industry Standards Workshop  

NLE Websites -- All DOE Office Websites (Extended Search)

Information Information Resources Printable Version Share this resource Send a link to Solid-State Lighting: DOE Hosts LED Industry Standards Workshop to someone by E-mail Share Solid-State Lighting: DOE Hosts LED Industry Standards Workshop on Facebook Tweet about Solid-State Lighting: DOE Hosts LED Industry Standards Workshop on Twitter Bookmark Solid-State Lighting: DOE Hosts LED Industry Standards Workshop on Google Bookmark Solid-State Lighting: DOE Hosts LED Industry Standards Workshop on Delicious Rank Solid-State Lighting: DOE Hosts LED Industry Standards Workshop on Digg Find More places to share Solid-State Lighting: DOE Hosts LED Industry Standards Workshop on AddThis.com... Conferences & Meetings Past Conferences Presentations Publications Webcasts Videos Tools

43

LED Lighting: Just the Facts, Please! | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

LED Lighting: Just the Facts, Please! LED Lighting: Just the Facts, Please! LED Lighting: Just the Facts, Please! January 4, 2010 - 7:30am Addthis John Lippert My June 16, 2009 blog gave tips on purchasing high-quality LED lights. Now there's another arsenal in the toolbox to help consumers find LED lights they can trust: the Lighting Facts(tm) label. As part of the SSL Quality Advocates voluntary pledge program developed jointly by the U.S. Department of Energy and the Next Generation Lighting Industry Alliance (NGLIA), the label is similar to the familiar nutrition label found on most food products. The label contains a lot of information that can help a consumer compare lighting products, including: light output in lumens; watts, the power the light consumes; lumens per watt, a measure of the product's efficacy (how

44

LED Lights for All Occasions | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Lights for All Occasions Lights for All Occasions LED Lights for All Occasions November 15, 2012 - 1:15pm Addthis With such a variety of lights available, LEDs are a perfect choice for holiday lighting. | Photo courtesy of ©iStockphoto.com/Birzio With such a variety of lights available, LEDs are a perfect choice for holiday lighting. | Photo courtesy of ©iStockphoto.com/Birzio Elizabeth Spencer Communicator, National Renewable Energy Laboratory What does this mean for me? Energy-efficient LED lights can be used to save money while decorating this holiday season. The topic of lighting is no stranger to the Energy Saver blog. And energy-efficient lights--and particularly LEDs--are one of those wonderful things that come up a lot around the holidays, since there are so many wonderful ways to use them. But it's still too early to talk about

45

Have You Used LED Light Strings? | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

LED Light Strings? LED Light Strings? Have You Used LED Light Strings? December 3, 2009 - 7:30am Addthis This week, you read about LED holiday light strings, which can use 90% less energy than regular incandescent light strings. You may even be able to save on the initial costs with rebates from stores or your utility; check to find out what's being offered in your area. Have you used LED light strings? Tell us what you think of them. Each Thursday, you have the chance to share your thoughts on a question about energy efficiency or renewable energy for consumers. E-mail your responses to the Energy Saver team at consumer.webmaster@nrel.gov. Addthis Related Articles Save Money with LED Holiday Light Strings Tips to Save Energy During the Holidays Choosing Energy-Saving Lighting Products Saves You Money

46

LEDs  

NLE Websites -- All DOE Office Websites (Extended Search)

Biomedical devices from ultraviolet Biomedical devices from ultraviolet LEDs February 24, 2012 LEDs produce light in the ultraviolet range A process for creating glass-based, inorganic light-emitting diodes (LEDs) that produce light in the ultraviolet range has been developed by a multinational team of scientists. The work, reported in the online Nature Communications, is a step toward biomedical devices with active components made from nanostructured systems. Solution-processed inorganic nanocrystals hold promise LEDs based on solution-processed inorganic nanocrystals have promise for use in environmental and biomedical diagnostics because they are cheap to produce, - 2 - robust, and chemically stable. But development has been hampered by the difficulty of achieving ultraviolet emission. In their paper, LANL's Sergio Brovelli and a research team lead by Alberto Paleari at the

47

Breakthrough Makes LED Lights More Versatile Author: Andrea Thompson  

E-Print Network (OSTI)

Breakthrough Makes LED Lights More Versatile Author: Andrea Thompson Source: http://www.livescience.com/technology/ LEDs have started to blink on all over the place in recent years, from car taillights to roadside these limitations by combining the best of two worlds of LEDs to make ultrathin, ultrasmall and flexible light

Rogers, John A.

48

LED Traffic Lights Get Buy American Stamp | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

LED Traffic Lights Get Buy American Stamp LED Traffic Lights Get Buy American Stamp LED Traffic Lights Get Buy American Stamp November 29, 2010 - 10:00am Addthis LED traffic lights are assembled at Dialight’s factory in Roxboro, N.C. The company has expanded production at the facility, adding more than 100 jobs over the past two years. | Photo Courtesy of Dialight LED traffic lights are assembled at Dialight's factory in Roxboro, N.C. The company has expanded production at the facility, adding more than 100 jobs over the past two years. | Photo Courtesy of Dialight Lindsay Gsell LED traffic lights are assembled at Dialight's factory in Roxboro, N.C. The company has expanded production at the facility, adding more than 100 jobs over the past two years. Red. Yellow. Green. What LED traffic signals don't say: Made in USA.

49

LED Linear Lamps and Troffer Lighting  

Energy.gov (U.S. Department of Energy (DOE))

The CALiPER program performed a series of investigations on linear LED lamps. Each report in the series covers the performance of up to 31 linear LED lamps, which were purchased in late 2012 or 2013. The first report focuses on bare lamp performance of LED T8 replacement lamps and subsequent reports examine performance in various troffers, as well as cost-effectiveness. There is also a concise guidance document that describes the findings of the Series 21 studies and provides practical advice to manufacturers, specifiers, and consumers (Report 21.4: Summary of Linear (T8) LED Lamp Testing , 5 pages, June 2014).

50

Lighting Group: Sources and Ballasts: LED Reflector Lamp  

NLE Websites -- All DOE Office Websites (Extended Search)

LED Reflector Lamp LED Reflector Lamp LED Reflector Lamp Objective LED reflector lamp The goal of this project is to develop a revolutionary new reflector lamp which offers many advantages over current incandescent reflector lamps, including: three times greater efficiency ten times the rated life greater optical and performance properties use of light emitting diodes (LEDs) to generate the light. Although LEDs have been commercially available since the late 1960Â’s, recent dramatic improvements in LED technology have led to white light devices with efficiencies that meet or exceed those of a standard incandescent lamp. This project will build upon these improvements to develop a new type of source for focusing light. Contact Information For more information on this project, please contact:

51

LED Lighting on the National Mall | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

LED Lighting on the National Mall LED Lighting on the National Mall LED Lighting on the National Mall Addthis 1 of 8 Facing East toward the Capitol Building, LED retrofitted lights line the interior paths of the mall while preserving the architectural integrity of the original fixtures. Image: Energy Department Image | Photo by Quentin Kruger (Contractor) | Public Domain Date taken: 2012-01-30 06:00 2 of 8 Energy Secretary Steven Chu discusses the 65% savings on electric bills and lowered maintenance costs the National Parks Service is experiencing by switching to energy efficient LED lights. "Using energy-efficient LED light bulbs is an important way Americans can save money by saving energy," said Secretary Chu. "Investing in an American economy that is built to last includes taking advantage of all of America's energy resources while

52

Webcast: Evaluating LED Street Lighting Solutions  

Energy.gov (U.S. Department of Energy (DOE))

In this July 20, 2010 webcast, Edward Smalley of Seattle City Light provided an update on DOE Municipal Solid-State Street Lighting Consortium activities. The webcast also presented perspectives...

53

Save Money with LED Holiday Light Strings | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Money with LED Holiday Light Strings Money with LED Holiday Light Strings Save Money with LED Holiday Light Strings December 1, 2009 - 11:19am Addthis Allison Casey Senior Communicator, NREL It's hard to believe, but the holidays are in full swing and many of you are starting to decorate your homes. Those of you who started around Halloween are probably feeling pretty smart because you got your decorating done while the weather was nice. I see you there, snacking on your Thanksgiving leftovers, laughing at me shivering in the cold and struggling to undo the knot in my lights. Don't look so smug. Those of us who haven't started decorating yet may actually be the smart ones this year, because we still have a chance to buy LED light strings. LED (or light emitting diode) light strings can use 90% less energy than

54

Information Resources: Webcast: Evaluating LED Street Lighting Solutions  

NLE Websites -- All DOE Office Websites (Extended Search)

Evaluating LED Street Lighting Solutions Evaluating LED Street Lighting Solutions In this July 20, 2010 webcast, Edward Smalley of Seattle City Light provided an update on DOE Municipal Solid-State Street Lighting Consortium activities. The webcast also presented perspectives from members who are involved with implementing LED street lighting evaluations, including Tod Rosinbum of the City of Portland, Oregon, John Walter of National Grid, and Amy Olay of the City of San Jose, California. View presentation slides (Visit the Adobe® Web site to Download Adobe Reader.) Introduction (PDF 984 KB) Edward Smalley, DOE Municipal Solid-State Street Lighting Consortium, Moderator Evaluating LED Street Lighting Solutions (PDF 404 KB) Tod Rosinbum, City of Portland, Oregon LED Pilot Projects: A Utility Perspective (PDF 112 KB)

55

Considering LEDs for Street and Area Lighting  

Energy.gov (U.S. Department of Energy (DOE))

View Jim Brodrick's keynote video from the September 2009 IES Street and Area Lighting Conference in Philadelphia.

56

Keeping Pace with LED Lighting Trends | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Keeping Pace with LED Lighting Trends Keeping Pace with LED Lighting Trends Keeping Pace with LED Lighting Trends October 23, 2013 - 10:41am Addthis This year's SSL Market Introduction Workshop will take place in Portland, Oregon. | Photo courtesy of Travel Portland This year's SSL Market Introduction Workshop will take place in Portland, Oregon. | Photo courtesy of Travel Portland Jim Brodrick Lighting Program Manager Rapid advances in solid-state lighting (SSL) technology are reducing the cost, improving the performance and quality, and bringing new lighting options--light emitting diodes (LEDs) to the market. But for lighting and energy efficiency industry professionals this seemingly good news can be "too much of a good thing." Imagine the challenge of making smart institutional purchasing decisions or designing

57

Energy - LEDs to light UT arena | ornl.gov  

NLE Websites -- All DOE Office Websites (Extended Search)

to 85 percent more efficient than conventional arena metal halide lights. The light-emitting diode fixtures developed by Oak Ridge-based LED North America incorporate an Oak...

58

High-power LED Technology and Solid State Lighting  

Science Journals Connector (OSTI)

The rapid adoption of LEDs in general illumination is fueled by high-power phosphor-conversion and direct color blue and red LED technology. Over the last several years...

Goetz, Werner

59

DOE Science Showcase - Light-emitting Diode (LED) Lighting Research | OSTI,  

Office of Scientific and Technical Information (OSTI)

Science Showcase - Light-emitting Diode (LED) Lighting Research Science Showcase - Light-emitting Diode (LED) Lighting Research Light-emitting diode (LED) lighting is a type of solid-state lighting that uses a semiconductor to convert electricity to light. LED lighting products are beginning to appear in a wide variety of home, business, and industrial products such as holiday lighting, replacement bulbs for incandescent lamps, street lighting, outdoor area lighting and indoor ambient lighting. Over the past decade, LED technology research and development supported by the U.S. Department of Energy (DOE) has yielded impressive improvements in the cost, color performance, light output, efficacy, reliability, lifetime, and manufacturability of LED products and this upward trend is expected to continue. Read about the latest DOE research, the technology behind LEDs,

60

Department of Mechanical Engineering Spring 2013 Lumax Lighting 2: LED Industrial High Bay Light Fixture  

E-Print Network (OSTI)

PENNSTATE Department of Mechanical Engineering Spring 2013 Lumax Lighting 2: LED Industrial High was to design a light fixture for an industrial setting using high power LED lights. The challenge with these LEDs is that they get so hot in a very little time period that the LED will fail and not work anymore

Demirel, Melik C.

Note: This page contains sample records for the topic "led general lighting" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


61

Article Published on LED Lumen Maintenance and Light Loss Factors  

Energy.gov (U.S. Department of Energy (DOE))

An article has been published in LEUKOS: The Journal of the Illuminating Engineering Society of North America (IES) that may be of interest to the solid-state lighting community. Entitled "Lumen Maintenance and Light Loss Factors: Consequences of Current Design Practices for LEDs," the article was written by Michael Royer of Pacific Northwest National Laboratory and discusses complications related to the lamp lumen depreciation (LLD) light loss factor and LEDs.

62

LED Traffic Lights Get Buy American Stamp | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

LED Traffic Lights Get Buy American Stamp LED Traffic Lights Get Buy American Stamp LED Traffic Lights Get Buy American Stamp November 30, 2010 - 10:19am Addthis Red. Yellow. Green. What LED traffic signals don't say: Made in USA. That is changing. Dialight Corporation, an LED lighting manufacturer with U.S. corporate offices in Farmingdale, New Jersey, and a parent company based in the U.K., invested nearly $3 million into renovating their 75,000-square-foot production facility in Roxboro, North Carolina. With these improvements, Dialight's Roxboro plant is projected to scale up production by 400 percent. "Bringing manufacturing back to America is a win-win scenario," said Roy Burton, Dialight's Group Chief Executive. "We're helping the economy by creating new jobs, and at the same time we're finding it more

63

Solid-State Lighting: LED Site Lighting in the Commercial Building Sector:  

NLE Websites -- All DOE Office Websites (Extended Search)

Site Lighting in the Site Lighting in the Commercial Building Sector: Opportunities, Challenges, and the CBEA Performance Specification to someone by E-mail Share Solid-State Lighting: LED Site Lighting in the Commercial Building Sector: Opportunities, Challenges, and the CBEA Performance Specification on Facebook Tweet about Solid-State Lighting: LED Site Lighting in the Commercial Building Sector: Opportunities, Challenges, and the CBEA Performance Specification on Twitter Bookmark Solid-State Lighting: LED Site Lighting in the Commercial Building Sector: Opportunities, Challenges, and the CBEA Performance Specification on Google Bookmark Solid-State Lighting: LED Site Lighting in the Commercial Building Sector: Opportunities, Challenges, and the CBEA Performance Specification on Delicious

64

Solid-State Lighting: Member Case Studies: LED Street Lighting Programs in  

NLE Websites -- All DOE Office Websites (Extended Search)

Member Case Studies: LED Street Member Case Studies: LED Street Lighting Programs in Algona (IA), Asheville (NC), and Boston (MA) to someone by E-mail Share Solid-State Lighting: Member Case Studies: LED Street Lighting Programs in Algona (IA), Asheville (NC), and Boston (MA) on Facebook Tweet about Solid-State Lighting: Member Case Studies: LED Street Lighting Programs in Algona (IA), Asheville (NC), and Boston (MA) on Twitter Bookmark Solid-State Lighting: Member Case Studies: LED Street Lighting Programs in Algona (IA), Asheville (NC), and Boston (MA) on Google Bookmark Solid-State Lighting: Member Case Studies: LED Street Lighting Programs in Algona (IA), Asheville (NC), and Boston (MA) on Delicious Rank Solid-State Lighting: Member Case Studies: LED Street Lighting Programs in Algona (IA), Asheville (NC), and Boston (MA) on Digg

65

Spectral optimization of the color temperature tunable white light-emitting diode (LED) cluster consisting of direct-emission blue and red LEDs and a diphosphor conversion LED  

Science Journals Connector (OSTI)

The correlated color temperature (CCT) tunable white-light LED cluster, which consists of direct-emission blue and red LEDs as well as phosphor-conversion (PC) LEDs packaged by...

Zhong, Ping; He, Guoxing; Zhang, Minhao

2012-01-01T23:59:59.000Z

66

LED Holiday Lights: Festive, Safe, and Efficient! | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

LED Holiday Lights: Festive, Safe, and Efficient! LED Holiday Lights: Festive, Safe, and Efficient! LED Holiday Lights: Festive, Safe, and Efficient! December 2, 2010 - 4:34pm Addthis Andy Oare Andy Oare Former New Media Strategist, Office of Public Affairs Ed. Note cross posted from the Energy Savers Blog. Written by Allison Casey This week brings a day that many people look forward to all year -- and I'm not talking about Thanksgiving, or Black Friday. I'm talking about that magical day when it's finally okay to drag the dusty boxes from the basement or attic, to lovingly sort and display your decorations, to untangle your light strings and set up the stepladder, all in anticipation of one glorious moment: Dad's annual trip to the emergency room. I kid (and sincerely hope that's not your yearly ritual), but in addition

67

LED traffic lights: New technology signals major energy savings  

SciTech Connect

Using light-emitting diode technology to replace incandescent lamps in traffic signals promises energy savings upwards of 60 percent for each of the estimated quarter of a million controlled intersections in the United States. LED units use only 9 to 25 watts instead of the 67 to 150 watts used by each incandescent lamp. Though their first cost is relatively high, energy savings result in paybacks of 1 to 5 years. LED retrofit kits are available for red signal disks and arrows, and installations in several states have proven successful, although minor improvements are addressing concerns about varying light output and controller circuitry. Retrofitting green lamps is not yet feasible, because color standards of the Institute of Traffic Engineers cannot be met with existing LED technology. Yellow lamps have such low duty factors (they`re on only 3 percent of the time) that retrofitting with LED signals is not cost-effective. LEDs last much longer than incandescents, allowing municipalities to not only reduce their electricity bills, but to save on maintenance costs as well. As further incentive, some utilities are beginning to implement rebate programs for LED traffic signal retrofits. Full approval of LED units is still awaited from the Institute of Traffic Engineers (ITE), the standard-setting body for traffic safety devices. Local and state governments ultimately decide what specifications to require for traffic lights, and the growing body of successful field experience with LEDs appears to be raising their comfort level with the technology. The California Department of Transportation is developing an LED traffic light specification, and two California utilities, Southern California Edison and Pacific Gas and Electric, have provided rebates for some pilot installations.

Houghton, D.

1994-12-31T23:59:59.000Z

68

Demonstrating LED and Fiber Optic Lighting in Commissary Applications  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Demonstrating LED and Fiber Optic Demonstrating LED and Fiber Optic Lighting in Commissary Applications Joseph Konrade Energy Technology Program Specialist Federal Energy Management Program 2 GOAL OF THE PROJECT * Promote New Lighting Technology * Document Energy Savings * Duplicate the technology * Expand Alternative Financing Opportunities * Include Lighting Technology in Government Projects within Utility Service Territory 3 History * FEMP sponsored E4 audits * Audit designed to review Utility Cost, Operations and Maintenance, New Technology Application * 3 Defense Commissary Agency (DeCA) received services under the agreement with DOE * Fort George G Meade pays a high electricity rate Electricity cost $0.171/kWh (PWC sub-metered rate) * Commissary was previously unmetered - Meter installed during installation of lighting project. New meter showing higher

69

LOW-COST LED LUMINAIRE FOR GENERAL ILLUMINATION  

SciTech Connect

During this two-year Solid-State Lighting (SSL) Manufacturing R&D project Cree developed novel light emitting diode (LED) technologies contributing to a cost-optimized, efficient LED troffer luminaire platform emitting at ~3500K correlated color temperature (CCT) at a color rendering index (CRI) of >90. To successfully achieve program goals, Cree used a comprehensive approach to address cost reduction of the various optical, thermal and electrical subsystems in the luminaire without impacting performance. These developments built on Cree’s high- brightness, low-cost LED platforms to design a novel LED component architecture that will enable low-cost troffer luminaire designs with high total system efficacy. The project scope included cost reductions to nearly all major troffer subsystems as well as assembly costs. For example, no thermal management components were included in the troffer, owing to the optimized distribution of compact low- to mid-power LEDs. It is estimated that a significant manufacturing cost savings will result relative to Cree’s conventional troffers at the start of the project. A chief project accomplishment was the successful development of a new compact, high-efficacy LED component geometry with a broad far-field intensity distribution and even color point vs. emission angle. After further optimization and testing for production, the Cree XQ series of LEDs resulted. XQ LEDs are currently utilized in Cree’s AR series troffers, and they are being considered for use in other platforms. The XQ lens geometry influenced the independent development of Cree’s XB-E and XB-G high-voltage LEDs, which also have a broad intensity distribution at high efficacy, and are finding wide implementation in Cree’s omnidirectional A-lamps.

Lowes, Ted

2014-07-31T23:59:59.000Z

70

Veiliger uitharden met Elipar™ FreeLight 2 LED  

Science Journals Connector (OSTI)

De lichtintensiteit van de Elipar Free- Light 2 LED uithardingslamp is verhoogd van 1.000 mW/cm2 naar 1.200 mW/cm2. Dit verbetert polymerisatiediepte en biedt een extra veiligheidsvoordeel voor de klinische situa...

   

2005-06-01T23:59:59.000Z

71

Solid-State Lighting: Text-Alternative Version: LED Site Lighting in the  

NLE Websites -- All DOE Office Websites (Extended Search)

Site Lighting in the Commercial Building Sector: Opportunities, Challenges, Site Lighting in the Commercial Building Sector: Opportunities, Challenges, and the CBEA Performance Specification to someone by E-mail Share Solid-State Lighting: Text-Alternative Version: LED Site Lighting in the Commercial Building Sector: Opportunities, Challenges, and the CBEA Performance Specification on Facebook Tweet about Solid-State Lighting: Text-Alternative Version: LED Site Lighting in the Commercial Building Sector: Opportunities, Challenges, and the CBEA Performance Specification on Twitter Bookmark Solid-State Lighting: Text-Alternative Version: LED Site Lighting in the Commercial Building Sector: Opportunities, Challenges, and the CBEA Performance Specification on Google Bookmark Solid-State Lighting: Text-Alternative Version: LED Site

72

LED Holiday Lights: Festive, Safe, and Efficient! | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Holiday Lights: Festive, Safe, and Efficient! Holiday Lights: Festive, Safe, and Efficient! LED Holiday Lights: Festive, Safe, and Efficient! November 23, 2010 - 6:30am Addthis Allison Casey Senior Communicator, NREL This week brings a day that many people look forward to all year-and I'm not talking about Thanksgiving, or Black Friday. I'm talking about that magical day when it's finally okay to drag the dusty boxes from the basement or attic, to lovingly sort and display your decorations, to untangle your light strings and set up the stepladder, all in anticipation of one glorious moment: Dad's annual trip to the emergency room. I kid (and sincerely hope that's not your yearly ritual), but in addition to safety when hanging your lights this year, I hope you'll think about something else: efficiency.

73

Is the light emitting diode (LED) an ultimate lamp?  

Science Journals Connector (OSTI)

Simple diagrams are used to show the transformation of a thin “slab” of intrinsic semiconductor (direct gap k elec =k hole ) from an ideal “flat-band” photopumped recombination-radiation light source into an ultimate lamp a p–n junctionlight emitting diode(LED). A photoexcited intrinsic slab of semiconductor can be regarded as an ideal (“flat-band”) light source with however the photogenerated carriers and voltage available externally instead of as recombination radiation (light) if the slab is converted to half p type (one side) and half n type (the other side) i.e. to a p–n junction. If an equal a “bucking ” external voltage is applied resulting in an input current when the photoexcitation is removed the slab becomes again (remains) an ideal “flat-band” light source a p–n junctionLED. In practice the LED takes the form of a p–n heterostructure in order to improve electron–hole injection reduce the absorption of recombination radiation and to make possible—with proper geometries—improved photon escape.

N. Holonyak Jr.

2000-01-01T23:59:59.000Z

74

Solid-State Lighting: Text-Alternative Version: Evaluating LED Street  

NLE Websites -- All DOE Office Websites (Extended Search)

Evaluating LED Street Lighting Solutions to someone by E-mail Evaluating LED Street Lighting Solutions to someone by E-mail Share Solid-State Lighting: Text-Alternative Version: Evaluating LED Street Lighting Solutions on Facebook Tweet about Solid-State Lighting: Text-Alternative Version: Evaluating LED Street Lighting Solutions on Twitter Bookmark Solid-State Lighting: Text-Alternative Version: Evaluating LED Street Lighting Solutions on Google Bookmark Solid-State Lighting: Text-Alternative Version: Evaluating LED Street Lighting Solutions on Delicious Rank Solid-State Lighting: Text-Alternative Version: Evaluating LED Street Lighting Solutions on Digg Find More places to share Solid-State Lighting: Text-Alternative Version: Evaluating LED Street Lighting Solutions on AddThis.com... Conferences & Meetings Presentations

75

LED Site Lighting in the Commercial Building Sector: Opportunities, Challenges, and the CBEA Performance Specification  

Energy.gov (U.S. Department of Energy (DOE))

This March 26, 2009 webcast presented information about the Commercial Building Energy Alliances' (CBEA) efforts to explore the viability of LED site lighting in commercial parking lots. LED...

76

OLEDS FOR GENERAL LIGHTING  

SciTech Connect

The goal of this program was to reduce the long term technical risks that were keeping the lighting industry from embracing and developing organic light-emitting diode (OLED) technology for general illumination. The specific goal was to develop OLEDs for lighting to the point where it was possible to demonstrate a large area white light panel with brightness and light quality comparable to a fluorescence source and with an efficacy comparable to that of an incandescent source. it was recognized that achieving this would require significant advances in three area: (1) the improvement of white light quality for illumination, (2) the improvement of OLED energy efficiency at high brightness, and (3) the development of cost-effective large area fabrication techniques. The program was organized such that, each year, a ''deliverable'' device would be fabricated which demonstrated progress in one or more of the three critical research areas. In the first year (2001), effort concentrated on developing an OLED capable of generating high illumination-quality white light. Ultimately, a down-conversion method where a blue OLED was coupled with various down-conversion layers was chosen. Various color and scattering models were developed to aid in material development and device optimization. The first year utilized this approach to deliver a 1 inch x 1 inch OLED with higher illumination-quality than available fluorescent sources. A picture of this device is shown and performance metrics are listed. To their knowledge, this was the first demonstration of true illumination-quality light from an OLED. During the second year, effort concentrated on developing a scalable approach to large area devices. A novel device architecture consisting of dividing the device area into smaller elements that are monolithically connected in series was developed. In the course of this development, it was realized that, in addition to being scalable, this approach made the device tolerant to the most common OLED defect--electrical shorts. This architecture enabled the fabrication of a 6 inch x 6 inch OLED deliverable for 2002. A picture of this deliverable is shown and the performance metrics are listed. At the time, this was the highest efficiency, highest lumen output illumination-quality OLED in existence. The third year effort concentrated on improving the fabrication yield of the 6 inch x 6 inch devices and improving the underlying blue device efficiency. An efficiency breakthrough was achieved through the invention of a new device structure such that now 15 lumen per watt devices could be fabricated. A 2 feet x 2 feet OLED panel consisting of sixteen 6 inch x 6 inch high efficiency devices tiled together was then fabricated. Pictures of this panel are shown with performance metrics listed. This panel met all project objectives and was the final deliverable for the project. It is now the highest efficiency, highest lumen output, illumination-quality OLED in existence.

Anil Duggal; Don Foust; Chris Heller; Bill Nealon; Larry Turner; Joe Shiang; Nick Baynes; Tim Butler; Nalin Patel

2004-02-29T23:59:59.000Z

77

Amber LEDs for Solid-State Lighting: White light with unprecendented efficiencies  

NLE Websites -- All DOE Office Websites (Extended Search)

Amber LEDs for Solid-State Lighting: Amber LEDs for Solid-State Lighting: White light with unprecedented efficiencies Commercialization Webinar December 10, 2013 2 Agenda for Today's Webinar * Welcome/Logistics * Technology Overview * Commercialization Opportunity * Q&A 3 Presenters Yoriko Morita, PhD MBA licensing manager Kirstin Alberi, PhD inventor 4 Technology Overview * Background/Context * Limitations NREL's Technology Addresses o Substrate material o Efficiency o Manufacturing * Performance Testing Results * Summary of Benefits/Advantages NREL is a national laboratory of the U.S. Department of Energy, Office of Energy Efficiency and Renewable Energy, operated by the Alliance for Sustainable Energy, LLC. Amber LEDs for Solid-State Lighting: White light with unprecedented efficiencies

78

LED Components and the Related Solutions for Solid-State Lightings Applications  

Science Journals Connector (OSTI)

The high brightness (HB) and the high power (HP) LED components for solid-state lighting applications are introduced in the slides. The industry leading Lighting-Class LED components...

Shao, Jiaping

79

New Use of LED Light: Intense Concentration into a Small Focal Spot  

Science Journals Connector (OSTI)

For decades, optics for focusing laser and solar light has been developed. Here, we explain the radiometry and discuss the nonimaging optics for efficient concentration of LED light...

Moreno, Ivan; Rodriguez, Nayeli

80

A High-Speed LED Driver That Sweeps Out the Remaining Carriers for Visible Light Communications  

Science Journals Connector (OSTI)

The modulation speed of light-emitting diodes (LEDs) must be increased to improve the speed, increase the bandwidth, and miniaturize the hardware of visible light communication (VLC)...

Kishi, Toshiki; Tanaka, Hiroyuki; Umeda, Yohtaro; Takyu, Osamu

2013-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "led general lighting" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


81

Camera Based Interactive Wall Display With Hand Detection Using LED Lights  

E-Print Network (OSTI)

Camera Based Interactive Wall Display With Hand Detection Using LED Lights Sit Chu Wah, Sin Kwok our system. Also, three LED lights are required to put on the fingers to help the system to detect immediately and produces associated output. Output Hand detection using LED lights X-Y Coordination analysis

Wu, Dekai

82

Crystal coat warms up LED light 16:46 01 February 2008  

E-Print Network (OSTI)

Crystal coat warms up LED light 16:46 01 February 2008 NewScientist.com news service Mason Inman Topping LEDs with a coating of carefully tuned nanocrystals makes their light warmer and less clinical, a new study shows. The researchers argue this is a must for energy- efficient LED lights to make headway

Demir, Hilmi Volkan

83

Current-voltage model of LED light sources Szymon Bczkowski, Stig Munk-Nielsen  

E-Print Network (OSTI)

Current-voltage model of LED light sources Szymon Bczkowski, Stig Munk-Nielsen Department of Energy shifts caused by varying magnitude of LED driving current and nonlinear relationship between intensity radiation into visible light, are gradually being replaced by light-emitting diodes. The invention of LEDs

Munk-Nielsen, Stig

84

Solid-State Lighting: Text-Alternative Version: LEDs for Interior Office  

NLE Websites -- All DOE Office Websites (Extended Search)

LEDs LEDs for Interior Office Applications to someone by E-mail Share Solid-State Lighting: Text-Alternative Version: LEDs for Interior Office Applications on Facebook Tweet about Solid-State Lighting: Text-Alternative Version: LEDs for Interior Office Applications on Twitter Bookmark Solid-State Lighting: Text-Alternative Version: LEDs for Interior Office Applications on Google Bookmark Solid-State Lighting: Text-Alternative Version: LEDs for Interior Office Applications on Delicious Rank Solid-State Lighting: Text-Alternative Version: LEDs for Interior Office Applications on Digg Find More places to share Solid-State Lighting: Text-Alternative Version: LEDs for Interior Office Applications on AddThis.com... Conferences & Meetings Presentations Publications

85

Solid-State Lighting: LED Replacement Lamps: Current Performance and the  

NLE Websites -- All DOE Office Websites (Extended Search)

LED Replacement Lamps: Current LED Replacement Lamps: Current Performance and the Latest on ENERGY STAR® to someone by E-mail Share Solid-State Lighting: LED Replacement Lamps: Current Performance and the Latest on ENERGY STAR® on Facebook Tweet about Solid-State Lighting: LED Replacement Lamps: Current Performance and the Latest on ENERGY STAR® on Twitter Bookmark Solid-State Lighting: LED Replacement Lamps: Current Performance and the Latest on ENERGY STAR® on Google Bookmark Solid-State Lighting: LED Replacement Lamps: Current Performance and the Latest on ENERGY STAR® on Delicious Rank Solid-State Lighting: LED Replacement Lamps: Current Performance and the Latest on ENERGY STAR® on Digg Find More places to share Solid-State Lighting: LED Replacement Lamps: Current Performance and the Latest on ENERGY STAR® on

86

LED Lighting Flicker and Potential Health Concerns: IEEE Standard PAR1789 Update  

E-Print Network (OSTI)

LED Lighting Flicker and Potential Health Concerns: IEEE Standard PAR1789 Update Arnold Wilkins Working Group, IEEE PAR1789 "Recommending practices for modulating current in High Brightness LEDsStar and other standards groups about the emerging concern of flicker in LED lighting. This paper introduces

Lehman, Brad

87

High-performance LED street lighting using microlens arrays  

Science Journals Connector (OSTI)

An efficient LED lamp that illuminates the street with high quality is presented. The luminaire shows high optical efficiency, high optical utilization factor, low glare, and...

Lee, Xuan-Hao; Moreno, Ivan; Sun, Ching-Cherng

2013-01-01T23:59:59.000Z

88

AC-LED based Visible Light Communication Systems Using Multiple Transmitter Design for Reducing Latency  

Science Journals Connector (OSTI)

This work demonstrates by employing multiple alternating-current light-emitting-diode (AC-LED) communication modules, the transmission gap in time-domain caused by the LED threshold...

Liu, Y; Yeh, C; Chow, C W

89

Calibration of Cangaroo II Telescope Using a Fast Blue LED Light Flasher  

E-Print Network (OSTI)

Calibration of Cangaroo II Telescope Using a Fast Blue LED Light Flasher John R. Patterson, David L;=460 nm) LED type Nichia (NSPB 510S), which has a temperature stable light output and a risetime of #24; 1.physics.adelaide.edu.au/astrophysics/cangaroo.html #12; FIGURE 1. The LED asher/telescope with the Ramsden eyepiece #12;tted and a previous LED holder

Enomoto, Ryoji

90

Slideshow: Flipping the Switch on LED Lighting for the National Mall |  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Slideshow: Flipping the Switch on LED Lighting for the National Slideshow: Flipping the Switch on LED Lighting for the National Mall Slideshow: Flipping the Switch on LED Lighting for the National Mall January 31, 2012 - 3:05pm Addthis 1 of 8 Facing East toward the Capitol Building, LED retrofitted lights line the interior paths of the mall while preserving the architectural integrity of the original fixtures. Image: Energy Department Image | Photo by Quentin Kruger (Contractor) | Public Domain Date taken: 2012-01-30 06:00 2 of 8 Energy Secretary Steven Chu discusses the 65% savings on electric bills and lowered maintenance costs the National Parks Service is experiencing by switching to energy efficient LED lights. "Using energy-efficient LED light bulbs is an important way Americans can save money by saving energy," said

91

Solid-State Lighting: Text-Alternative Version: Successful Selection of LED  

NLE Websites -- All DOE Office Websites (Extended Search)

Text-Alternative Version: Text-Alternative Version: Successful Selection of LED Streetlight Luminaires Webcast to someone by E-mail Share Solid-State Lighting: Text-Alternative Version: Successful Selection of LED Streetlight Luminaires Webcast on Facebook Tweet about Solid-State Lighting: Text-Alternative Version: Successful Selection of LED Streetlight Luminaires Webcast on Twitter Bookmark Solid-State Lighting: Text-Alternative Version: Successful Selection of LED Streetlight Luminaires Webcast on Google Bookmark Solid-State Lighting: Text-Alternative Version: Successful Selection of LED Streetlight Luminaires Webcast on Delicious Rank Solid-State Lighting: Text-Alternative Version: Successful Selection of LED Streetlight Luminaires Webcast on Digg Find More places to share Solid-State Lighting: Text-Alternative

92

Slideshow: Flipping the Switch on LED Lighting for the National Mall |  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Slideshow: Flipping the Switch on LED Lighting for the National Slideshow: Flipping the Switch on LED Lighting for the National Mall Slideshow: Flipping the Switch on LED Lighting for the National Mall January 31, 2012 - 3:05pm Addthis 1 of 8 Facing East toward the Capitol Building, LED retrofitted lights line the interior paths of the mall while preserving the architectural integrity of the original fixtures. Image: Energy Department Image | Photo by Quentin Kruger (Contractor) | Public Domain Date taken: 2012-01-30 06:00 2 of 8 Energy Secretary Steven Chu discusses the 65% savings on electric bills and lowered maintenance costs the National Parks Service is experiencing by switching to energy efficient LED lights. "Using energy-efficient LED light bulbs is an important way Americans can save money by saving energy," said

93

Solid-State Lighting: Text-Alternative Version: Model Specification for LED  

NLE Websites -- All DOE Office Websites (Extended Search)

Information Information Resources Printable Version Share this resource Send a link to Solid-State Lighting: Text-Alternative Version: Model Specification for LED Roadway Luminaires Webcast to someone by E-mail Share Solid-State Lighting: Text-Alternative Version: Model Specification for LED Roadway Luminaires Webcast on Facebook Tweet about Solid-State Lighting: Text-Alternative Version: Model Specification for LED Roadway Luminaires Webcast on Twitter Bookmark Solid-State Lighting: Text-Alternative Version: Model Specification for LED Roadway Luminaires Webcast on Google Bookmark Solid-State Lighting: Text-Alternative Version: Model Specification for LED Roadway Luminaires Webcast on Delicious Rank Solid-State Lighting: Text-Alternative Version: Model Specification for LED Roadway Luminaires Webcast on Digg

94

LED Lighting Freeform Lens for achieving Octagon Spot  

Science Journals Connector (OSTI)

To decreasing the design error caused by the point source model, a method combining freeform and aspherical surface is presented. A LED spotlight lens for realizing octagon spot is...

Shaoyun, Yin; Sun, Xiuhui; Xia, Liangping; Du, Chunlei

95

Growth and pigment content of Gracilaria tikvahiae McLachlan under fluorescent and LED lighting  

Science Journals Connector (OSTI)

Abstract Light emitting diode (LED) technology has significant potential advantages over other light sources in algal aquaculture. This study investigated \\{LEDs\\} as light sources for the culture of Gracilaria tikvahiae. We cultured a wild-type and a green mutant strain of G. tikvahiae, comparing growth rate and tissue chlorophyll a, total carotenoids, and phycobiliprotein concentrations under high output cool white fluorescent, pure primary color LED, and mixed LED lighting. Under monochromatic light, the growth rates under high output cool white fluorescent lighting were significantly higher than rates under pure LED light (all three colors for wild strain and green and blue for green mutant). However, when pure color LED lighting was mixed (50%/50%), the red + green (wild-type strain and green mutant) and the green + blue LED combinations (wild-type only) showed growth rates similar to those under high output cool white fluorescent lighting. In the trichromatic experiment, growth of the wild-type strain under mixed three-color (40%/40%/20%) LED light was indistinguishable from those of the fluorescent control lighting. Chlorophyll a and carotenoid concentrations of Gracilaria grown in the dichromatic light experiment were 55% and 74% higher, respectively, under red + blue LED lighting than under the other light treatments. The wild-type strain of G. tikvahiae possessed significantly greater concentrations of chlorophyll a, and phycoerythrin than did the green mutant, while green mutant thalli had higher phycocyanin levels. With rising LED efficiency and energy savings, \\{LEDs\\} will be an increasingly better choice for indoor seaweed cultivation, especially if control of pigment production and morphogenesis by selective use of particular wavelengths is desirable.

Jang K. Kim; Yunxiang Mao; George Kraemer; Charles Yarish

2015-01-01T23:59:59.000Z

96

Text Alternative Version: Life-Cycle Assessment of Energy and Environmental Impacts of LED Lighting Products  

Energy.gov (U.S. Department of Energy (DOE))

Below is the text-alternative version of the "Life-Cycle Assessment of Energy and Environmental Impacts of LED Lighting Products" webcast, held March 28, 2013.

97

Text-Alternative Version: CALiPER Series 21 on LED Linear Lamps and Troffer Lighting  

Energy.gov (U.S. Department of Energy (DOE))

Following is a text version of a video about CALiPER Application Report Series 21 on LED Linear Lamps and Troffer Lighting.

98

Text-Alternative Version: MSSLC Member Case Studies- LED Street Lighting Programs Webinar  

Energy.gov (U.S. Department of Energy (DOE))

Below is the text-alternative version of the "MSSLC Member Case Studies - LED Street Lighting Programs" webcast, held May 8, 2013.

99

New family of tiny crystals glow bright in LED lights | ornl...  

NLE Websites -- All DOE Office Websites (Extended Search)

New family of tiny crystals glow bright in LED lights ORNL scientist probes atomic structure to improve materials' luminescence efficiency Oak Ridge National Laboratory scientists...

100

LED Linear Lamps and Troffer Lighting: CALiPER Report Series 21  

SciTech Connect

Video about CALiPER Report Series 21 on LED Linear Lamps and Troffer Lighting, featuring interviews with Tracy Beeson and Naomi Miller of Pacific Northwest National Laboratory.

Beeson, Tracy; Miller, Naomi

2014-06-17T23:59:59.000Z

Note: This page contains sample records for the topic "led general lighting" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


101

What Do You Think of Your LED Holiday Lights? | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

What Do You Think of Your LED Holiday Lights? What Do You Think of Your LED Holiday Lights? What Do You Think of Your LED Holiday Lights? December 23, 2010 - 6:30am Addthis This year, we've been encouraging people to switch to LED light strings for their holiday decorations. With the many options for shapes, colors, and sizes, people are discovering that they like or dislike various aspects of the lights. One of the biggest things to like, of course, is the major energy savings, but some folks have also discovered that the lights have a slightly different color or reflect off of ornaments in a different way. Change can be difficult, especially when we've been seeing the same types of decorations for so many years, but we hope that you've made the switch and are enjoying the savings and festivity that LED lights can add to your

102

What Do You Think of Your LED Holiday Lights? | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Think of Your LED Holiday Lights? Think of Your LED Holiday Lights? What Do You Think of Your LED Holiday Lights? December 23, 2010 - 6:30am Addthis This year, we've been encouraging people to switch to LED light strings for their holiday decorations. With the many options for shapes, colors, and sizes, people are discovering that they like or dislike various aspects of the lights. One of the biggest things to like, of course, is the major energy savings, but some folks have also discovered that the lights have a slightly different color or reflect off of ornaments in a different way. Change can be difficult, especially when we've been seeing the same types of decorations for so many years, but we hope that you've made the switch and are enjoying the savings and festivity that LED lights can add to your

103

Depth of cure and compressive strength of dental composites cured with blue light emitting diodes (LEDs)  

E-Print Network (OSTI)

Depth of cure and compressive strength of dental composites cured with blue light emitting diodes with either a light emitting diode (LED) based light curing unit (LCU) or a conventional halogen LCU do reserved. Keywords: Blue light emitting diodes; Light curing unit; Composites; Irradiance; Spectrum; Depth

Ashworth, Stephen H.

104

Member Case Studies: LED Street Lighting Programs in Algona (IA), Asheville (NC), and Boston (MA)  

Energy.gov (U.S. Department of Energy (DOE))

This May 8, 2013 webcast featured presentations from DOE Municipal Solid-State Street Lighting Consortium member cities about their experiences with LED street lighting. Presenters John Bilsten of...

105

Hybrid sunlight/LED illumination and renewable solar energy saving concepts for indoor lighting  

Science Journals Connector (OSTI)

A hybrid method for using sunlight and light-emitting diode (LED) illumination powered by renewable solar energy for indoor lighting is simulated and presented in this study. We can...

Tsuei, Chih-Hsuan; Sun, Wen-Shing; Kuo, Chien-Cheng

2010-01-01T23:59:59.000Z

106

Solar LED Light Pilot Project Illuminates the Way in Alabama | Department  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

LED Light Pilot Project Illuminates the Way in Alabama LED Light Pilot Project Illuminates the Way in Alabama Solar LED Light Pilot Project Illuminates the Way in Alabama September 12, 2012 - 2:15pm Addthis Boaz, Alabama Mayor Tim Walker, along with state representatives and community leaders, cut the ribbon for the state's solar LED light pilot project. | Photo courtesy of Lionel Green, Sand Mountain Reporter. Boaz, Alabama Mayor Tim Walker, along with state representatives and community leaders, cut the ribbon for the state's solar LED light pilot project. | Photo courtesy of Lionel Green, Sand Mountain Reporter. Tertia Speiser Project Officer, Golden Field Office "I want to invite everyone to come to Boaz and see the future of responsible highway lighting and power generation." -Boaz Mayor Tim Walker

107

Solar LED Light Pilot Project Illuminates the Way in Alabama | Department  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Solar LED Light Pilot Project Illuminates the Way in Alabama Solar LED Light Pilot Project Illuminates the Way in Alabama Solar LED Light Pilot Project Illuminates the Way in Alabama September 12, 2012 - 2:15pm Addthis Boaz, Alabama Mayor Tim Walker, along with state representatives and community leaders, cut the ribbon for the state's solar LED light pilot project. | Photo courtesy of Lionel Green, Sand Mountain Reporter. Boaz, Alabama Mayor Tim Walker, along with state representatives and community leaders, cut the ribbon for the state's solar LED light pilot project. | Photo courtesy of Lionel Green, Sand Mountain Reporter. Tertia Speiser Project Officer, Golden Field Office "I want to invite everyone to come to Boaz and see the future of responsible highway lighting and power generation." -Boaz Mayor Tim Walker

108

Salazar, Chu to Flip Switch on Energy-Efficient LED Lights on National Mall  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

to Flip Switch on Energy-Efficient LED Lights on to Flip Switch on Energy-Efficient LED Lights on National Mall Salazar, Chu to Flip Switch on Energy-Efficient LED Lights on National Mall January 30, 2012 - 11:02am Addthis WASHINGTON, D.C.-Today, Secretary of the Interior Ken Salazar and Secretary of Energy Steven Chu will participate in a lighting ceremony featuring the newly-installed LED lights on the National Mall. Illuminating the Mall from 3rd to 15th Streets, the LED technology is expected to reduce lighting energy by up to 65 percent and provide a well-lit atmosphere to welcome the National Mall's 25 million annual visitors. "Achieving an economy built on American energy will require an all-of-the-above approach, one that includes safely and responsibly developing our domestic energy resources - and making the most of what we

109

Energy-Department Supported Scientist Receives Nobel Prize for Blue Light LED  

Office of Energy Efficiency and Renewable Energy (EERE)

This week, three scientists—two from Japan and one from the United States—received the Nobel Prize in physics for their work on the LED light. The trifecta, Isamu Akasaki, Hiroshi Amano and Shuji Nakamura, earned the prestigious award specifically for their invention of the blue light emitting diode, a game-changer in the history of LED lights. The American scientist, Shuji Nakamura, a pioneer in the lighting industry, is the founder of LED company Soraa, which has a history of working with the Department of Energy—both through EERE and our Advanced Research Projects Agency-Energy (ARPA-E)—on the subject of blue light diodes.

110

Research Support in Hungary Machine scheduling LED public lighting Microsimulation in public transportation Finally Optimization and Operation Research methods for  

E-Print Network (OSTI)

Research Support in Hungary Machine scheduling LED public lighting Microsimulation in public, 2011 Industrial Innovation Problems #12;Research Support in Hungary Machine scheduling LED public Innovation Problems #12;Research Support in Hungary Machine scheduling LED public lighting Microsimulation

Balázs, Bánhelyi

111

Is blue optical filter necessary in high speed phosphor-based white light LED visible light communications?  

Science Journals Connector (OSTI)

Optical blue filter is usually regarded as a critical optical component for high speed phosphor-based white light emitting diode (LED) visible-light-communication (VLC). However, the...

Sung, Jiun-Yu; Chow, Chi-Wai; Yeh, Chien-Hung

2014-01-01T23:59:59.000Z

112

Researchers Say They've Solved the Mystery of LED Lighting "Droop" |  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Researchers Say They've Solved the Mystery of LED Lighting "Droop" Researchers Say They've Solved the Mystery of LED Lighting "Droop" Researchers Say They've Solved the Mystery of LED Lighting "Droop" May 5, 2011 - 3:32pm Addthis An illustration of nitride-based LEDs.| Courtesy of the National Energy Research Scientific Computing Center. An illustration of nitride-based LEDs.| Courtesy of the National Energy Research Scientific Computing Center. Margie Wylie Communications Specialist, Berkeley Lab Computing Sciences Team. Despite being cool, ultra-efficient and long lasting, the light-emitting diode (LED) faces a problem called "efficiency droop." New findings from simulations carried out at the National Energy Research Scientific Computer Center (NERSC) have unearthed droop's elusive cause, researchers

113

Largest-area Photonic Crystal LED Fabricated Demonstrates Uniform Light Emission  

Energy.gov (U.S. Department of Energy (DOE))

Lumileds Lighting, the University of New Mexico, and Sandia National Laboratories teamed to demonstrate uniform light emission from the largest-area III-Nitride photonic crystal LED (1 x 1 mm2) ever fabricated. Most previous photonic crystal LED research has relied on small-area patterns written by slow, serial-writing electron-beam lithography.

114

Chip-Scale Power Conversion for LED Lighting: Integrated Power Chip Converter for Solid-State Lighting  

SciTech Connect

ADEPT Project: Teledyne is developing cost-effective power drivers for energy-efficient LED lights that fit on a compact chip. These power drivers are important because they transmit power throughout the LED device. Traditional LED driver components waste energy and don't last as long as the LED itself. They are also large and bulky, so they must be assembled onto a circuit board separately which increases the overall manufacturing cost of the LED light. Teledyne is shrinking the size and improving the efficiency of its LED driver components by using thin layers of an iron magnetic alloy and new gallium nitride on silicon devices. Smaller, more efficient components will enable the drivers to be integrated on a single chip, reducing costs. The new semiconductors in Teledyne's drivers can also handle higher levels of power and last longer without sacrificing efficiency. Initial applications for Teledyne's LED power drivers include refrigerated grocery display cases and retail lighting.

None

2010-10-01T23:59:59.000Z

115

Solid-State Lighting: Text-Alternative Version: The L Prize-Winning LED A19  

NLE Websites -- All DOE Office Websites (Extended Search)

The L The L Prize-Winning LED A19 Replacement-What Commercial Building Owners/Operators Can Expect in 2012 to someone by E-mail Share Solid-State Lighting: Text-Alternative Version: The L Prize-Winning LED A19 Replacement-What Commercial Building Owners/Operators Can Expect in 2012 on Facebook Tweet about Solid-State Lighting: Text-Alternative Version: The L Prize-Winning LED A19 Replacement-What Commercial Building Owners/Operators Can Expect in 2012 on Twitter Bookmark Solid-State Lighting: Text-Alternative Version: The L Prize-Winning LED A19 Replacement-What Commercial Building Owners/Operators Can Expect in 2012 on Google Bookmark Solid-State Lighting: Text-Alternative Version: The L Prize-Winning LED A19 Replacement-What Commercial Building Owners/Operators Can Expect in 2012 on Delicious

116

Nonvisual effects of led coloured ambient lighting on well-being and cardiac reactivity: preliminary findings  

Science Journals Connector (OSTI)

This study examined the immediate nonvisual effects of ambient lighting colours and illuminance on momentary wellbeing and physiology during daytime. As reported in recent literature, the effects of lighting extend beyond comfort and safety issues. Illuminance ... Keywords: LED, cardiac reactivity, colour lighting, illuminance, nonvisual effects, well-being

Michel Varkevisser; Roy J. E. M. Raymann; David V. Keyson

2011-07-01T23:59:59.000Z

117

Production Hall and Inventory Shade Lighting by Solar Energy System and Economical Lighting (LEDs)  

Science Journals Connector (OSTI)

Due to the increasing energy and environmental concern in the world, one must look for alternatives to nonrenewable energy resources and the polluting fossil fuels. The renewable energy sources play an important role in electricity generation as well as many other useful applications. Various renewable energy sources like wind, solar, geothermal, ocean thermal and biomass can be used for generating electricity and meeting our daily energy demands. The solar energy can produce most of the world's requirements of the energy that is produced by the sun and collected on earth. Clean and sustainable energy protect our environment. The solar energy system with economical lighting (LEDs) can be used for lighting the production hall and inventory stores to reduce the energy consumption (watts) to less than a quarter of the normal consumption (high pressure, light HPL) and that will reduce the cost of energy. In addition, using the sun tracker will increase the efficiency of overall daily output of the solar panels more than 34% of the fixed panel. This will make the system more reliable and more economical.

Ahmad K. Jassim; Fouad K. Abood

2012-01-01T23:59:59.000Z

118

LED Light Fixture Project FC1 Director's Conference Room: Life Cycle Cost and Break-even Analysis  

E-Print Network (OSTI)

LED Light Fixture Project ­ FC1 Director's Conference Room: Life Cycle Cost and Break-even Analysis sources. One of the emerging lighting technologies that facilities organizations are looking at are LEDs. A light-emitting diode (LED) is a solid-state lighting source that switches on instantly, is readily

Johnston, Daniel

119

LED Linear Lamps and Troffer Lighting: CALiPER Report Series 21  

Energy.gov (U.S. Department of Energy (DOE))

View the video about CALiPER Report Series 21 on LED Linear Lamps and Troffer Lighting, featuring interviews with Tracy Beeson and Naomi Miller of Pacific Northwest National Laboratory.

120

Rectangular illumination using a secondary optics with cylindrical lens for LED street light  

Science Journals Connector (OSTI)

The illumination pattern of an LED street light is required to have a rectangular distribution at a divergence-angle ratio of 7:3 for economical illumination. Hence, research supplying...

Chen, Hsi-Chao; Lin, Jun-Yu; Chiu, Hsuan-Yi

2013-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "led general lighting" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


121

Life-Cycle Assessment of Energy and Environmental Impacts of LED Lighting Products  

Energy.gov (U.S. Department of Energy (DOE))

This March 28, 2013 webcast reviewed DOE's recently completed three-part study of the life-cycle energy and environmental impacts of LED lighting products relative to incandescent and CFL...

122

AUBELE - self-sufficient LED street light powered by fuel cells  

Science Journals Connector (OSTI)

Energy saving, in connection to renewable energy sources is an important topic. The project AUBELE represents a small step in this direction - a self-sufficient LED street lighting,...

Just, Jens-Uwe; Fischer, Ulrich H P

123

A LIGHT READ: A flexible array of LEDs on a folded sheet of paper.  

E-Print Network (OSTI)

electrically conductive polymers and deposited on bendable plastic substrates. Conventional, inorganic LEDs and inorganic LEDs by harnessing the light of conventional electronics in an elastic system with biomedical potential. "The applications we're interested in mostly include interfaces with the human body," says John

Rogers, John A.

124

Replacement of Lighting Fixtures with LED Energy Efficient Lights at the Parking Facility, Milwaukee, Wisconsin  

SciTech Connect

The Forest County Potawatomi Community (FCPC or Tribe) owns a six-story parking facility adjacent to its Potawatomi Bingo Casino (the Casino) in Milwaukee, Wisconsin, as well as a valet parking facility under the Casino (collectively, the Parking Facility). The Parking Facility contained 205-watt metal halide-type lights that, for security reasons, operated 24 hours per day, 7 days per week. Starting on August 30, 2010, the Tribe replaced these fixtures with 1,760 state-of-the-art, energy efficient 55-Watt LED lights. This project resulted in an immediate average reduction in monthly peak demand of 238 kW over the fourth quarter of 2010. The average reduction in monthly peak demand from October 1 through December 31, 2010 translates into a forecast annual electrical energy reduction of approximately 1,995,000 kWh or 47.3% of the pre-project demand. This project was technically effective, economically feasible, and beneficial to the public not only in terms of long term energy efficiency and associated emissions reductions, but also in the short-term jobs provided for the S.E. Wisconsin region. The project was implemented, from approval by U.S. Department of Energy (DOE) to completion, in less than 6 months. The project utilized off-the-shelf proven technologies that were fabricated locally and installed by local trade contractors.

David Brien

2012-06-21T23:59:59.000Z

125

Seeing the Light: LED Under-Cabinet and Recessed Downlights | Department of  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Seeing the Light: LED Under-Cabinet and Recessed Downlights Seeing the Light: LED Under-Cabinet and Recessed Downlights Seeing the Light: LED Under-Cabinet and Recessed Downlights August 2, 2010 - 10:42am Addthis Chris Stewart Senior Communicator at DOE's National Renewable Energy Laboratory I moved into my apartment about four years ago. Little by little, I've continued to make improvements that help me save money on my energy bills. I've: Applied weatherstripping to seal air leaks around windows Insulated my crawl space Installed storm windows to reduce air movement into and out of existing windows (I live in a historic district and can't replace my windows) Installed window shades to help with insulation Replaced my incandescent lighting fixtures with compact fluorescent lamps (CFLs) (I even purchased outdoor solar lights for my dad for Fathers Day.)

126

Why Did the LED Light Bulb Cross the Road? | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Why Did the LED Light Bulb Cross the Road? Why Did the LED Light Bulb Cross the Road? Why Did the LED Light Bulb Cross the Road? January 24, 2012 - 1:31pm Addthis Big Bill and Little Bill are here to talk with you about energy efficiency on behalf of Energy Impact Illinois. Roland Risser Roland Risser Program Director, Building Technologies Office How can I participate? You can view all of Big Bill and Little Bill's videos on the Energy Bill's YouTube channel. Everyone knows that laughter is good for you. Studies suggest it can buffer stress and increase your resistance to disease. Also, it just feels great to laugh. Advertisers have long used the allure of laughter to sell their products, and many Americans tune in to the Super Bowl just to chuckle at the funny commercials. However, when it comes to selling people on smart

127

Why Did the LED Light Bulb Cross the Road? | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Why Did the LED Light Bulb Cross the Road? Why Did the LED Light Bulb Cross the Road? Why Did the LED Light Bulb Cross the Road? January 24, 2012 - 1:31pm Addthis Big Bill and Little Bill are here to talk with you about energy efficiency on behalf of Energy Impact Illinois. Roland Risser Roland Risser Program Director, Building Technologies Office How can I participate? You can view all of Big Bill and Little Bill's videos on the Energy Bill's YouTube channel. Everyone knows that laughter is good for you. Studies suggest it can buffer stress and increase your resistance to disease. Also, it just feels great to laugh. Advertisers have long used the allure of laughter to sell their products, and many Americans tune in to the Super Bowl just to chuckle at the funny commercials. However, when it comes to selling people on smart

128

Off-grid energy services for the poor: Introducing LED lighting in the Millennium Villages Project in Malawi  

E-Print Network (OSTI)

Off-grid energy services for the poor: Introducing LED lighting in the Millennium Villages Project 2009 Keywords: Solar Lighting Development a b s t r a c t Lanterns that use light-emitting diodes (LEDs as a cost-competitive alternative to kerosene and other fuel-based lighting technologies, offering brighter

Modi, Vijay

129

Abstract--Since a few years, the vehicle industry tends to increase the performances of the lights based on led  

E-Print Network (OSTI)

based on led technologies. Nowadays, led systems are used as a standard by motor vehicles manufacturers. Led lights present higher reliability and are more flexible regarding the design or power adjustments. Furthermore, led systems are also very convenient for intensity modulation like in telecommunication fields

Boyer, Edmond

130

New Family of Tiny Crystals Glow Bright in LED Lights | Advanced Photon  

NLE Websites -- All DOE Office Websites (Extended Search)

How Serotonin Receptors Can Shape Drug Effects, from LSD to Migraine How Serotonin Receptors Can Shape Drug Effects, from LSD to Migraine Medication X-rays Paint a Picture of Picasso's Pigments Antibody Evolution Could Guide HIV Vaccine Development Blue Ruthenium Dimer Catalysis for Hydrogen Generation A High-Pressure Nano-imaging Breakthrough Science Highlights Archives: 2013 | 2012 | 2011 | 2010 2009 | 2008 | 2007 | 2006 2005 | 2004 | 2003 | 2002 2001 | 2000 | 1998 | Subscribe to APS Science Highlights rss feed New Family of Tiny Crystals Glow Bright in LED Lights JUNE 7, 2013 Bookmark and Share Laue microdiffraction pattern acquired from a nanoribbon in experiments at the APS. Minuscule crystals that glow different colors may be the missing ingredient for white light-emitting diode (LED) lighting that illuminates homes and

131

LED Record Efficacy and Brightness  

Energy.gov (U.S. Department of Energy (DOE))

Designed for general lighting applications such as street, industrial, and parking garage lighting, the Cree XLamp® power LED sets new records for LED brightness and efficacy, up to 85 lm/W at 350 mA. The XLamp utilizes Cree's performance breakthrough EZBright™ LED chip; both products include technology that was developed in part with R&D funding support from DOE.

132

Red light emitting solid state hybrid quantum dot–near-UV GaN LED devices  

Science Journals Connector (OSTI)

We produced core–shell (CdSe)ZnSe quantum dots by direct colloidal chemical synthesis and the surface-passivation method—an overcoating of the core CdSe with a larger-bandgap material ZnSe. The (CdSe)ZnSe quantum dots(QDs) play the role of a colour conversion centre. We call these quantum dots nanophosphors. We fabricated red light emitting hybrid devices of (CdSe)ZnSe QDs and a near-UV GaN LED by combining red light emitting (CdSe)ZnSe quantum dots (as a colour conversion centre) with a near-UV(NUV) GaN LED chip (as an excitation source). A few good red phosphors have been known for UV excitation wavelengths, and red phosphors for UV excitation have been sought for a long time. Here we tested the possibility of using (CdSe)ZnSe QDs as red nanophosphors for UV excitation. The fabricated red light emitting hybrid device of (CdSe)ZnSe and a NUV GaN LED chip showed a good luminance. We demonstrated that the (CdSe)ZnSe quantum dots were promising red nanophosphors for NUV excitation and that a red LED made of QDs and a NUV excitation source was a highly efficient hybrid device.

Hongjoo Song; Seonghoon Lee

2007-01-01T23:59:59.000Z

133

LED Lamp Project Lights the Way to Flicker-Free Replacement Jade Sky Technologies and UC Davis's California Lighting Technology Center demonstrate the  

E-Print Network (OSTI)

, 2014 ­ Jade Sky Technologies ("JST"), a clean-tech start-up manufacturer of LED Technologies and UC Davis's California Lighting Technology Center demonstrate the lighting Specification. JST collaborated with UC Davis's California Lighting Technology Center

California at Davis, University of

134

From carbon to light: a new framework for estimating greenhouse gas emissions reductions from replacing fuel-based lighting with LED systems  

Science Journals Connector (OSTI)

There is considerable well-intended, yet wishful anticipation about reducing greenhouse gas emissions by replacing fuel-based lighting in the developing world with grid-independent light-emitting diode (LED) lighting

Evan Mills; Arne Jacobson

2011-11-01T23:59:59.000Z

135

Text-Alternative Version: LED Site Lighting in the Commercial Building Sector: Opportunities, Challenges, and the CBEA Performance Specification  

Energy.gov (U.S. Department of Energy (DOE))

Below is the text-alternative version of the LED Site Lighting in the Commercial Building Sector: Opportunities, Challenges, and the CBEA Performance Specification webcast.

136

Sustainable infrastructure development: Assessing LED street lighting as a tool for sustainable development in Sao Jose dos Campos, Brazil.  

E-Print Network (OSTI)

??This research project investigates LED street lights as a tool for sustainable development in SĂŁo José dos Campos, Brazil. The project explores the energy and… (more)

Kivimäki, S.E.E.

2013-01-01T23:59:59.000Z

137

Investigation of self-adaptive LED surgical lighting based on entropy contrast enhancing method  

Science Journals Connector (OSTI)

Abstract Investigation was performed to explore the possibility of enhancing contrast by varying the spectral distribution (SPD) of the surgical lighting. The illumination scenes with different \\{SPDs\\} were generated by the combination of a self-adaptive white light optimization method and the LED ceiling system, the images of biological sample are taken by a CCD camera and then processed by an ‘Entropy’ based contrast evaluation model which is proposed specific for surgery occasion. Compared with the neutral white LED based and traditional algorithm based image enhancing methods, the illumination based enhancing method turns out a better performance in contrast enhancing and improves the average contrast value about 9% and 6%, respectively. This low cost method is simple, practicable, and thus may provide an alternative solution for the expensive visual facility medical instruments.

Peng Liu; Huihui Wang; Yaqin Zhang; Junfei Shen; Rengmao Wu; Zhenrong Zheng; Haifeng Li; Xu Liu

2014-01-01T23:59:59.000Z

138

The environmental regulation of maturation in goldfish, Carassius auratus: Effects of various LED light spectra  

Science Journals Connector (OSTI)

Abstract While there have been a number of studies on the effects of photoperiod and duration of light and dark exposure, much less information is available on the importance of light intensity. This study investigated the effects of exposure of goldfish, Carassius auratus exposed to white fluorescent bulbs, and red (peak at 630 nm), and green (530 nm) light emitting diodes (LEDs) at approximately 0.9 W/m2 (12-h light:12-h dark) for four months on a number of hormones of the hypothalamus–pituitary–gonad (HPG) axis, in vivo and in vitro. We investigated the effects of native GnRH molecules (gonadotropin-releasing hormones; salmon GnRH, sGnRH; and chicken GnRH-II, cGnRH-II), gonadotropin hormones (GTH?; follicle-stimulating hormone, FSH-?; luteinizing hormone, LH-?2), kisspeptin 1 (Kiss1) and G protein-coupled receptor 54 (GPR54) mRNA levels. Furthermore, we measured LH and 17?-hydroxypregnenolone levels in plasma and we performed gonad histological observations. GnRHs, Kiss1, GPR54 and GTH mRNA and plasma LH and 17?-hydroxypregnenolone levels in the in vivo and in vitro groups exposed to green \\{LEDs\\} were significantly higher than the other groups. Histological analysis revealed the presence of oocytes in the yolk stage in fish exposed to green light. These results suggest that green wavelengths regulate the HPG axis and enhance sexual maturation in goldfish.

Hyun Suk Shin; Hamid R. Habibi; Cheol Young Choi

2014-01-01T23:59:59.000Z

139

Luminous Efficacy Standards for General Purpose Lights  

Energy.gov (U.S. Department of Energy (DOE))

Assembly Bill 178, adopted in June 2007, established efficacy* standards for general purpose lights sold in the state of Nevada. The bill set the required efficacy at 25 lumens per watt (lm/W) of...

140

Philips Light Sources & Electronics is Developing an Efficient, Smaller, Cost-Effective Family of LED Drivers  

Energy.gov (U.S. Department of Energy (DOE))

With the help of DOE funding, Philips Light Sources & Electronics is developing a new family of LED drivers that are more efficient and cost-effective as well as smaller in size than currently available drivers. The new drivers are switch-mode power supplies that are similar to today's drivers, but with an improved design. In addition, they have a different topology—boost plus LLC—for wattages of 40W and above, but they retain the commonly used flyback topology at lower wattages.

Note: This page contains sample records for the topic "led general lighting" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


141

LED Lighting in a Performing Arts Building at the University of Florida  

SciTech Connect

The U.S. DOE GATEWAY Demonstration Program supports demonstrations of high-performance solid-state lighting (SSL) products in order to develop empirical data and experience with the in-the-field applications of this advanced lighting technology. This report describes the process and results of the 2013 - 2014 GATEWAY demonstration of SSL technology in the Nadine McGuire Theatre and Dance Pavilion at the University of Florida, Gainesville, FL. The LED solutions combined with dimming controls utilized in four interior spaces - the Acting Studio, Dance Studio, Scene Shop, and Dressing Room - received high marks from instructors, students/performers, and reduced energy use in all cases. The report discusses in depth and detail of each project area including specifications, energy savings, and user observations. The report concludes with lessons learned during the demonstration.

Miller, Naomi J.; Kaye, Stan; Coleman, Patricia; Wilkerson, Andrea M.; Perrin, Tess E.; Sullivan, Gregory P.

2014-07-01T23:59:59.000Z

142

Development of substrate-removal-free vertical ultraviolet light-emitting diode (RefV-LED)  

SciTech Connect

A vertical ultraviolet (UV) light-emitting diode (LED) that does not require substrate removal is developed. Spontaneous via holes are formed in n-AlN layer epitaxially grown on a high conductive n+Si substrate and the injected current flows directly from the p-electrode to high doped n{sup +} Si substrate through p-AlGaN, multi-quantum wells, n-AlGaN and spontaneous via holes in n-AlN. The spontaneous via holes were formed by controlling feeding-sequence of metal-organic gas sources and NH{sub 3} and growth temperature in MOCVD. The via holes make insulating n-AlN to be conductive. We measured the current-voltage, current-light intensity and emission characteristics of this device. It exhibited a built-in voltage of 3.8 V and emission was stated at 350 nm from quantum wells with successive emission centered at 400?nm. This UV LED can be produced, including formation of n and p electrodes, without any resist process.

Kurose, N., E-mail: kurose@fc.ritsumei.ac.jp; Aoyagi, Y. [The Research Organization of Science and Technology, Ritsumeikan University, 1-1-1, Noji-higashi, Kusatsu, Shiga 525-8577 (Japan)] [The Research Organization of Science and Technology, Ritsumeikan University, 1-1-1, Noji-higashi, Kusatsu, Shiga 525-8577 (Japan); Shibano, K.; Araki, T. [Department of Science and Technology, Ritsumeikan University, 1-1-1, Noji-higashi, Kusatsu, Shiga 525-8577 (Japan)] [Department of Science and Technology, Ritsumeikan University, 1-1-1, Noji-higashi, Kusatsu, Shiga 525-8577 (Japan)

2014-02-15T23:59:59.000Z

143

Predicting long-term lumen maintenance life of LED light sources using a particle filter-based prognostic approach  

Science Journals Connector (OSTI)

Abstract Lumen degradation is a common failure mode in LED light sources. Lumen maintenance life, defined as the time when the maintained percentages of the initial light output fall below a failure threshold, is a key characteristic for assessing the reliability of LED light sources. Owing to the long lifetime and high reliability of LED lights sources, it is challenging to estimate the lumen maintenance life for LED light sources using traditional life testing that records failure data. This paper describes a particle filter-based (PF-based) prognostic approach based on both Sequential Monte Carlo (SMC) and Bayesian techniques to predict the lumen maintenance life of LED light sources. The lumen maintenance degradation data collected from an accelerated degradation test was used to demonstrate the prediction algorithm and methodology of the proposed PF approach. Its feasibility and prediction accuracy were then validated and compared with the TM-21 standard method that was created by the Illuminating Engineering Society of North America (IESNA). Finally, a robustness study was also conducted to analyze the initialization of parameters impacting the prediction accuracy and the uncertainties of the proposed PF method. The results show that, compared to the TM-21 method, the PF approach achieves better prediction performance, with an error of less than 5% in predicting the long-term lumen maintenance life of LED light sources.

Jiajie Fan; Kam-Chuen Yung; Michael Pecht

2015-01-01T23:59:59.000Z

144

Performance of a novel LED lamp arrangement to reduce SNR fluctuation for multi-user visible light communication systems  

Science Journals Connector (OSTI)

This paper investigates the performance of our recently proposed LED lamp arrangement to reduce the SNR fluctuation from different locations in the room for multi-user visible light...

Wang, Zixiong; Yu, Changyuan; Zhong, Wen-De; Chen, Jian; Chen, Wei

2012-01-01T23:59:59.000Z

145

Fabrication and Characterization of a GaN Light-emitting Diode (LED) with a Centered Island Cathode  

Science Journals Connector (OSTI)

Uniform spreading of injection current in light-emitting diodes (LEDs) is one of the crucial requirements for better device performances. It is reported that non-uniform current...

Park, Yun Soo; Lee, Hwan Gi; Yang, Chung-Mo; Kim, Dong-Seok; Bae, Jin-Hyuk; Cho, Seongjae; Lee, Jung-Hee; Kang, In Man

2012-01-01T23:59:59.000Z

146

DOE Publishes GATEWAY Report on High-Luminous-Flux LED Lighting in a High-Temperature Environment  

Energy.gov (U.S. Department of Energy (DOE))

The U.S. Department of Energy has released a GATEWAY report on a trial demonstration in which the incumbent quartz metal halide (QMH) area lighting was replaced with LED at three pole locations...

147

Demonstration Assessment of Light Emitting Diode (LED) Residential Downlights and Undercabinet Lights in the Lane County Tour of Homes, Eugene, Oregon  

SciTech Connect

In August 2008 the Pacific Northwest National Laboratory (PNNL) conducted a light emitting diode (LED) residential lighting demonstration project for the U.S. Department of Energy (DOE), Office of Building Technologies, as part of DOE’s Solid State Lighting (SSL) Technology Demonstration Gateway Program. Two lighting technologies, an LED replacement for downlight lamps (bulbs) and an LED undercabinet lighting fixture, were tested in the demonstration which was conducted in two homes built for the 2008 Tour of Homes in Eugene, Oregon. The homes were built by the Lane County Home Builders Association (HBA), and Future B Homes. The Energy Trust of Oregon (ETO) also participated in the demonstration project. The LED downlight product, the LR6, made by Cree LED Lighting Solutions acts as a screw-in replacement for incandescent and halogen bulbs in recessed can downlights. The second product tested is Phillips/Color Kinetics’ eW® Profile Powercore undercabinet fixture designed to mount under kitchen cabinets to illuminate the countertop and backsplash surfaces. Quantitative and qualitative measurements of light performance and electrical power usage were taken at each site before and after initially installed halogen and incandescent lamps were replaced with the LED products. Energy savings and simple paybacks were also calculated and builders who toured the homes were surveyed for their responses to the LED products. The LED downlight product drew 12 Watts of power, cutting energy use by 82% compared to the 65W incandescent lamp and by 84% compared to the 75W halogen lamp. The LED undercabinet fixture drew 10 watts, cutting energy use by 83% to 90% compared to the halogen product, which was tested at two power settings: a low power 60W setting and a high power 105W setting. The LED downlight consistently provided more light than the halogen and incandescent lamps in horizontal measurements at counter height and floor level. It also outperformed in vertical illuminance measurements taken on the walls, indicating better lateral dispersion of the light. The undercabinet fixture’s light output was midway between the low and high power halogen undercabinet fixture light outputs (35.8 foot candle versus 13.4 fc and 53.4 fc) but it produced a more uniform light (max/min ratio of 7.0 versus 10.8). The color correlated temperature (CCT, the blue or yellowness) of the LED light correlated well with the halogen and incandescent lights (2675 K vs 2700 K). The color rendering of the LED downlight also correlated well at 92 CRI compared to 100 CRI for the halogen and incandescent lamps. The LED undercabinet fixture had measures of 2880 K CCT and 71 CRI compared to the 2700 K and 100 CRI scores for the halogen undercabinet fixture. Builders who toured the homes were surveyed; they gave the LED downlight high marks for brightness, said the undercabinet improved shadows and glare and said both products improved overall visibility, home appearance, and home value. Paybacks on the LED downlight ranged from 7.6 years (assuming electricity cost of 11 c/kWh) to 13.5 years (at 5C/kWh). Paybacks on the LED undercabinet fixture in a new home ranged from 4.4 years (11c/kWh electricity) to 7.6 years (5c/kWh) based on product costs of $95 per LED downlight and $140 per LED undercabinet fixture at 3 hrs per day of usage for the downlight and 2 hrs per day for the undercabinet lighting.

Ton, My K.; Richman, Eric E.; Gilbride, Theresa L.

2008-11-10T23:59:59.000Z

148

Abstract 4138: Fluorescence laparoscopy with an LED light source enables fluorescence-guided resection of pancreatic cancer, labeled with fluorophore-conjugated antibodies, in mouse models.  

Science Journals Connector (OSTI)

...4138: Fluorescence laparoscopy with an LED light source enables fluorescence-guided...495-nm emission filter and a Stryker L9000 LED light source 24 hours after tail vein injection...Bouvet. Fluorescence laparoscopy with an LED light source enables fluorescence-guided...

Cristina A. Metildi; Sharmeela Kaushal; George A. Luiken; Mark A. Talamini; Robert M. Hoffman; Michael Bouvet

2013-04-15T23:59:59.000Z

149

DOE Publishes Technical Brief Clarifying Misconceptions about Safety of LED Lighting  

Energy.gov (U.S. Department of Energy (DOE))

The spectral emission of LEDs is a frequent subject of concern, so to set the record straight, the U.S. Department of Energy has published a technical brief entitled True Colors: LEDs and the...

150

THE PROMISE OF SOLID STATE LIGHTING FOR GENERAL ILLUMINATION  

NLE Websites -- All DOE Office Websites (Extended Search)

Conclusions and Recommendations Conclusions and Recommendations from OIDA Technology Roadmaps Co-sponsored by DOE (BTS) and OIDA OIDA OPTOELECTRONICS INDUSTRY DEVELOPMENT ASSOCIATION 1133 Connecticut Avenue, NW Suite 600 Washington, DC 20036 Ph: (202) 785-4426 Fax: (202) 785-4428 Web: http://www.OIDA.org Building Technology, State and Community Programs Energy Efficiency and Renewable Energy U.S. Department of Energy Published by: Optoelectronics Industry Development Association 1133 Connecticut Avenue NW, Suite 600 Washington, DC 20036 Phone: (202) 785-4426 Fax: (202) 785-4428 Internet: http://www.oida.org 1 The Promise of Solid State Lighting for General Illumination s Light Emitting Diodes (LEDs) © 2001 Optoelectronics Industry Development Association Executive Summary In the midst of the rising fuel prices and the blackouts in California there is silent rev-

151

SAR-controlled adaptive off-time technique without sensing resistor for achieving high efficiency and accuracy LED lighting system  

Science Journals Connector (OSTI)

A successive approximation register (SAR) is utilized to control adaptive off-time in order to regulate accurate light-emitting diode (LED) current and improve efficiency of LED driver. The proposed SAR-controlled adaptive off-time technique without ... Keywords: adaptive off-time, hysteretic current control (HCC), on-chip low-side current sensing, peak current control (PCC), pulsewidth modulation (PWM) dimming, successive approximation register (SAR)

Chao-Hsuan Liu; Chun-Yu Hsieh; Yu-Chiao Hsieh; Ting-Jung Tai; Ke-Horng Chen

2010-06-01T23:59:59.000Z

152

LED Basics | Department of Energy  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

Basics LED Basics Unlike incandescent and fluorescent lamps, LEDs are not inherently white light sources. Instead, LEDs emit nearly monochromatic light, making them highly...

153

Comparison of the Electromagnetic Spectra of Common Light Sources: A General Chemistry Laboratory Exercise  

Science Journals Connector (OSTI)

Compact fluorescent light (CFL); light emitting diode (LED). ... White LED light can be produced by mixing light from red, green, and blue LEDs. ... Students observe that the white light from a six LED flashlight array (Figure 5) arises from two major peaks and that the spectrum is less continuous than those of incandescent bulbs, but more continuous than those of CFLs. ...

Edward Maslowsky, Jr.

2013-10-03T23:59:59.000Z

154

Potential Environmental Impacts from the Metals in Incandescent, Compact Fluorescent Lamp (CFL), and Light-Emitting Diode (LED) Bulbs  

Science Journals Connector (OSTI)

Artificial lighting systems are transitioning from incandescent to compact fluorescent lamp (CFL) and light-emitting diode (LED) bulbs in response to the U.S. Energy Independence and Security Act and the EU Ecodesign Directive, which leads to energy savings and reduced greenhouse gas emissions. ... The CFLs and LEDs have higher resource depletion and toxicity potentials than the incandescent bulb due primarily to their high aluminum, copper, gold, lead, silver, and zinc. ... mercury pollution; redn. in electricity demand from the substitution of incandescent bulbs with fluorescents leads to reduced mercury emissions during the use of the bulb. ...

Seong-Rin Lim; Daniel Kang; Oladele A. Ogunseitan; Julie M. Schoenung

2012-12-13T23:59:59.000Z

155

Jade Sky Technologies Partners with CLTC on LED Replacement Lamp Upgrade Project UC Davis' California Lighting Technology Center will utilize Jade Sky Technologies' driver ICs to help spur  

E-Print Network (OSTI)

Jade Sky Technologies Partners with CLTC on LED Replacement Lamp Upgrade Project UC Davis of cost-effective, easy-to-use LED lighting solutions Milpitas, Calif. ­ October 15, 2013 ­ Jade Sky Technologies (JST), a clean-tech start-up manufacturer of driver ICs for LED lighting applications, announces

California at Davis, University of

156

Polarization-multiplexed 2×2 phosphor-LED wireless light communication without using analog equalization and optical blue filter  

Science Journals Connector (OSTI)

Abstract We propose and experimentally demonstrate a 380 (2×190) Mbps phosphor-light-emitting-diode (LED) based visible light communication (VLC) system by using 2×2 polarization-multiplexing design for in-building access applications. To the best of our knowledge, this is the first time of employing polarization-multiplexing to achieve a high VLC transmission capacity by using phosphor-based white-LED without optical blue filter. Besides, utilizing the optimum resistor–inductor–capacity (RLC) bias-tee design, it can not only perform the function of combining the direct-current (DC) and the electrical data signal, but also act as a simple LED-Tx circuit. No optical blue filter and complicated post-equalization are required at the Rx. Here, the orthogonal-frequency-division-multiplexing (OFDM) quadrature-amplitude-modulation (QAM) with bit-loading is employed to enhance the transmission data rate.

C.H. Yeh; H.Y. Chen; Y.L. Liu; C.W. Chow

2015-01-01T23:59:59.000Z

157

DOE Publishes GATEWAY Report on High-Luminous-Flux LED Lighting...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

of the lighting system, despite the reduction in pole height. The combination of the optics and lower pole height reduced stray light considerably. The expected annual...

158

LED Provides Effective and Efficient Parking Area Lighting at the NAVFAC Engineering Service Center  

Energy.gov (U.S. Department of Energy (DOE))

Document details new lighting technology that reduces energy consumption and reduces maintenance, while providing effective illumination.

159

Assessing the Performance of 5mm White LED Light Sources for Developing-Country Applications  

E-Print Network (OSTI)

performance variations. Incandescent and fluorescent lightbetter than the common incandescent lamp. Off-grid lighting

Mills, Evan

2007-01-01T23:59:59.000Z

160

White lighting LEDs are fast replacing conventional lighting because not only are they energy efficient light sources but also can be modulated at frequencies up to 20MHz for high-speed wireless communication, especially for indoor applications.  

E-Print Network (OSTI)

are they energy efficient light sources but also can be modulated at frequencies up to 20MHz for high-speedBackground White lighting LEDs are fast replacing conventional lighting because not only wireless communication, especially for indoor applications. Moreover, using visible light as the source

Sekercioglu, Y. Ahmet

Note: This page contains sample records for the topic "led general lighting" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


161

Highly energy-efficient agricultural lighting by B+R \\{LEDs\\} with beam shaping using micro-lens diffuser  

Science Journals Connector (OSTI)

This paper presents a high-performance LED agricultural luminaire that uses a beam-shaping diffuser to achieve high optical efficiency and energy saving. The agricultural luminaire performs an optical efficiency as high as 84.2%. The beam shaping effect also obtains irradiance uniformity of 1/2.56 and excellent spatial color uniformity. The enhancement ratio of optical utilization factor in the proposed agricultural luminaire is 360% in comparison with traditional lighting. Under the designed case, the total utilization factor, including optical utilization factor and spectral utilization factor, of the B+R LED lamp can save 86.1% of power consumption in comparison with compact fluorescent bulbs.

Xuan-Hao Lee; Yu-Yu Chang; Ching-Cherng Sun

2013-01-01T23:59:59.000Z

162

EECBG Success Story: Solar LED Light Pilot Project Illuminates the Way in Alabama  

Energy.gov (U.S. Department of Energy (DOE))

A strip of new solar-powered LED streetlights in Boaz, Alabama were installed with grant funds from the Alabama Department of Economic and Community Affairs and $221,900 from the Energy Department through the Energy Efficiency and Conservation Block Grant (EECBG) program. Learn more.

163

Municipal Consortium LED Street Lighting Workshop: April 19–20, Los Angeles, CA  

Energy.gov (U.S. Department of Energy (DOE))

Workshop Location: The Sheraton Los Angeles Downtown Hotel, 711 Hope Street, Los Angeles, CA 90017City Partner: City of Los Angeles Bureau of Street LightingCost: $175

164

Municipal Consortium LED Street Lighting Workshop Presentations and Materials—Boston, MA  

Energy.gov (U.S. Department of Energy (DOE))

This page provides links to the presentations given at the DOE Municipal Solid-State Street Lighting Consortium Workshop held in Boston August 2–3, 2012.

165

Municipal Consortium LED Street Lighting Workshop Presentations and Materials—Los Angeles, CA  

Energy.gov (U.S. Department of Energy (DOE))

This page provides links to the presentations given at the DOE Municipal Solid-State Street Lighting Consortium Workshop held in Los Angeles April 19–20, 2012.

166

Municipal Consortium LED Street Lighting Workshop Presentations and Materials—Dallas, TX  

Energy.gov (U.S. Department of Energy (DOE))

This page provides links to the presentations given at the DOE Municipal Solid-State Street Lighting Consortium Workshop held in Dallas March 15–16, 2012.

167

LED Lightbulbs | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

ledshires.jpg Description LED lightbulbs More Documents & Publications LED Lightbulbs CFL Lightbulbs Lighting Choices - White Background...

168

The light-emitting diode (LED) is an fairly new kind of light source found currently in  

E-Print Network (OSTI)

this technology an ideal replacement for less efficient incandescent light sources, particularly in applications elevator lighting has the potential to achieve 25 percent greater efficiency than current incandescent ILLUMINATION LEVELS SIMILAR TO THOSE OF INCANDESCENT FIXTURES WHILE CUTTING ENERGY USE 45 PERCENT. ELEVATOR

169

High energy light scattering in the generalized eikonal approximation  

Science Journals Connector (OSTI)

The generalized eikonal approximation method is applied to the study of light scattering by a dielectric medium. In this method, the propagation of light inside the medium is assumed...

Chen, Tuan W

1989-01-01T23:59:59.000Z

170

GREEN LIVING Replace incandencent and halogen light bulbs with LED and CLFs  

E-Print Network (OSTI)

GREEN LIVING GUIDE ENERGY TRAVEL FOOD sustain yosef WATER Replace incandencent and halogen light POWER STRIPS! for you electronics, and turn them off when not in use Adjust your thermostat UP IN SUMMER Bicycle Initiative http://boonebikeinitiative.org LEAVE YOUR CAR AT HOME - save $ on a parking pass

Thaxton, Christopher S.

171

Sustainability constraints in techno-economic analysis of general lighting retrofits  

Science Journals Connector (OSTI)

Abstract Several governmental programs seek the adoption of measures to promote energy efficiency through the substitution of old incadescent light bulbs by \\{CFLs\\} (compact fluorescent lamps). However, fluorescent lamps emit UV, pollute the environment with mercury and rare earths if disposed recklessly. These also present higher performance degradation levels, lower efficiency and shorter lifespans if compared to \\{LEDs\\} (light emitting diodes), which require higher initial investment. We advocate that retrofits shall have a broader scope, pursuing beyond the achievement of short term efficiency and profitability, but the long term sustainability. Thus, selecting which technology to use in a retrofit requires thorough feasibility study comparing alternatives. We propose a framework using equivalent annual costs (EAC) as a metric for comparing substitute technologies in lighting retrofits, considering sustainability constraints as reverse logistics, waste management, performance degradation, lifespan, luminous efficiency and energy prices. The results of a simulated general lighting retrofit comparing LED tubes, \\{CFLs\\} and fluorescent tubulars demonstrate CFL as the highest annual cost and toxic waste disposal in most scenarios, fluorescent tubular as the most economic alternative, but if their lifespans shorten, LED prices drop or achieve higher efficiency LED becomes the most sustainable and economically attractive alternative.

Fabrício P. Vahl; Lucila M.S. Campos; Nelson Casarotto Filho

2013-01-01T23:59:59.000Z

172

LED ProspectsLED Prospects photometric units  

E-Print Network (OSTI)

/5/8 #12;16 Light bulb comparisonLight bulb comparison W lumens khours CRI $US Incandescent (long life) 75-life incandescent with LED. · 10 light fixtures/home, lights on for 6h/day, 333 days/yr. · Electricity 0.12 $/kWh. W khours $US Incandescent (long life) 100 10 2 LED (PAR38, warm, dimmable) 11 40 90 · What is the lifetime

Pulfrey, David L.

173

How to upgrade your incandescent light bulbs Many people are choosing replacements for their standard incandescent light bulbs to save money or energy, because they've heard of new LED  

E-Print Network (OSTI)

for their standard incandescent light bulbs to save money or energy, because they've heard of new LED options to choose replacement light bulbs. You can save energy and money by replacing any standard incandescent from The Lighting Pattern Book for Homes, LRC 1993. Lighting Energy Use by Room BR · Note the type

Bystroff, Chris

174

Effect of the combination of ethylene and red LED light irradiation on carotenoid accumulation and carotenogenic gene expression in the flavedo of citrus fruit  

Science Journals Connector (OSTI)

Abstract The effects of ethylene and red light-emitting diode (LED) light (660 nm) on the accumulation of carotenoid and expression of genes related to carotenoid biosynthesis were investigated in the flavedo of Satsuma mandarin. The results showed that the contents of ?-cryptoxanthin, all-trans-violaxanthin, 9-cis-violaxanthin and lutein were simultaneously increased along with the total carotenoid accumulation by the red LED light. With the ethylene treatment, the contents of ?-carotene and ?-cryptoxanthin were increased, while the content of lutein was decreased in the flavedo. The suppression of lutein accumulation by ethylene was inhibited when the ethylene treatment was performed under the red LED light. With the combination of ethylene and red LED light treatments, the contents of ?-cryptoxanthin and lutein were simultaneously increased. Gene expression results showed that simultaneous increases in the expression of CitPSY, CitPDS, CitZDS, CitCRTISO, CitLCYb1, CitLCYb2, CitLCYe, CitHYb, and CitZEP contributed to the accumulation of ?-cryptoxanthin and lutein in the treatment of ethylene combined with red LED light. The results presented might provide new strategies to enhance the commercial and nutritional value of citrus fruit.

Gang Ma; Lancui Zhang; Masaya Kato; Kazuki Yamawaki; Yoshikazu Kiriiwa; Masaki Yahata; Yoshinori Ikoma; Hikaru Matsumoto

2015-01-01T23:59:59.000Z

175

Effects of LED–laser hybrid light on bleaching effectiveness and tooth sensitivity: a randomized clinical study  

Science Journals Connector (OSTI)

The study evaluated the effectiveness and the sensitivity of in-office tooth bleaching with the use of a hybrid photo-activation system composed by LEDs and lasers. 40 patients, both genders, aged 18 through 25 years, were randomly distributed into two treatment groups: group I, 35% hydrogen peroxide, with a total bleaching time of 135 min divided into three sessions, and group II, 35% hydrogen peroxide and photo-thermal catalysis by an LED–laser system (300 mW cm?2), for a total bleaching time of 72 min divided into three sessions. The treatment efficiency was measured by reflectance spectroscopy and sensitivity by a visual analog scale (VAS). The final luminosity value (?L), color variation (?E) and sensitivity (S) resulting from the treatments were analyzed by the generalized estimating equations method (GEEs), and Bonferroni post hoc multiple comparisons at 5% significance. The two groups presented similar colors (?E) and luminosities (?L) after treatment. Group I presented a greater sensitivity index (37.6 ± 5.9%) compared to group II (11.1 ± 3.3%), statistically significant at p 

Janaina F Bortolatto; Hermes Pretel; Carolina S Neto; Marcelo F Andrade; Gustavo Moncada; Osmir B Oliveira Junior

2013-01-01T23:59:59.000Z

176

Recessed LED Downlights  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Recessed LED Downlights Recessed downlights are commonly used for ambient and directional lighting in both residential and commercial build- ings. One of the earliest applications...

177

Using LEDs | Department of Energy  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

maintenance, and long life-LEDs are well suited to a variety of lighting applications. LED products are most competitive in applications where these performance characteristics...

178

Recessed LED Downlights | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Recessed LED Downlights Recessed LED Downlights A Dept of Energy Solid-State Lighting Program technology fact sheet on recessed LED downlights. recesseddownlight.pdf More...

179

Future Directions in LED Applications  

Science Journals Connector (OSTI)

Another application space that will gain in importance is the use of LED lighting in agricultural applications . LED lighting for horticulture [60] is continuing to be investigated as more continues to be learne...

Robert F. Karlicek Jr. PhD

2014-01-01T23:59:59.000Z

180

TRUE COLORS: LEDS AND THE RELATIONSHIP BETWEEN CCT, CRI, OPTICAL SAFETY, MATERIAL DEGRADATION, AND PHOTOBIOLOGICAL STIMULATION  

SciTech Connect

This document analyzes the optical, material, and photobiological hazards of LED light sources compared to conventional light sources. It documents that LEDs generally produce the same amount of blue light, which is the primary contributor to the risks, as other sources at the same CCT. Duv may have some effect on the amount of blue light, but CRI does not.

Royer, Michael P.

2014-08-30T23:59:59.000Z

Note: This page contains sample records for the topic "led general lighting" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


181

Reducing LED Costs Through Innovation  

Energy.gov (U.S. Department of Energy (DOE))

A Wisconsin-based company is developing an innovative way to reduce manufacturing costs of light-emitting diodes (LEDs).

182

Optical design of a Butterfly lens for a street light based on a double-cluster LED  

Science Journals Connector (OSTI)

We construct a precise optical model of the cluster LED and propose a design of a peanut form lens to achieve an optical utilization factor of 45% and uniformity of 1/2.7. Then we propose a new design of so-called Butterfly lens with unequal tilt design aimed to serve a double-cluster LED but with a tightened size. The optical utilization factor of the Butterfly lens is about 43.8%, the uniformity is around 1/2.7, and an averaged illuminance of 14 lx, which could meet almost all types requested by IESNA. The design of the Butterfly lens is proven workable for a double-cluster LED.

Yi-Chien Lo; Kuan-Teng Huang; Xuan-Hao Lee; Ching-Cherng Sun

2012-01-01T23:59:59.000Z

183

Sandia National Laboratories: LED  

NLE Websites -- All DOE Office Websites (Extended Search)

electroluminescence was first reported by H.J. Round in 1907, and the first light-emitting diode (LED) was reported by O.V. Losev in 1927. Not until the birth of semiconductor...

184

Assessing the Performance of LED-Based Flashlights Available in the Kenyan Off-Grid Lighting Market  

E-Print Network (OSTI)

have largely displaced incandescent flashlights in retailinvolving the use of incandescent lighting, unless there areFluorescent Flashlight C Incandescent SPX 50 Fluorescent y x

Tracy, Jennifer

2010-01-01T23:59:59.000Z

185

Visible Light Digital Camera --Up to 2.3MP resolution with LED lamps provides sharp images  

E-Print Network (OSTI)

· Laser LocatIRTM Pointer -- Pinpoints the hot spot on the IR image with the real physical target (FLIR i case FLIR i40 Additional Features · 0.6MP Visible Light Camera resolution · Picture in Picture (PIP) fixed · 14,400 pixels (120 x 120) FLIR i50 Additional Features · 2.3MP Visible Light Camera resolution

Short, Daniel

186

From Enthusiasm to Economy: Precision Optical Design as a Key to Making LED Luminaires Cost-Efficient in Street Lighting and Architectural Lighting  

Science Journals Connector (OSTI)

Technical luminaries have to compete on an economic basis. Optics design plays a key role for the development of efficient products, providing unique light distributions and minimizing...

Timinger, Andreas

187

Energy Savings Potential of Solid-State Lighting in General Illumination Applications- Report  

Energy.gov (U.S. Department of Energy (DOE))

A U.S. DOE SSL report on Energy Savings Potential of Solid-State Lighting in General Illumination Applications.

188

Sandia National Laboratories: high-brightness LED  

NLE Websites -- All DOE Office Websites (Extended Search)

brightness LED ECIS-Veeco: Research Driving Down the Costs of Efficient LED Lighting On February 14, 2013, in Energy, Energy Efficiency, Materials Science, Partnership, Research &...

189

Illuminating the Pecking Order in Off-Grid Lighting: A Demonstration of LED Lighting for Saving Energy in the Poultry Sector  

E-Print Network (OSTI)

powered by a solar-wind hybrid system, the kerosene house,a 520-watt solar-wind hybrid system to power fluorescentLighting System Kerosene Solar-Wind Hybrid Fluorescent Solar

Tracy, Jennifer

2012-01-01T23:59:59.000Z

190

Solid-State Lighting  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

-U.S. Senator Jeff Bingaman, Chair, Senate Committee on Energy and Natural Resources 2013-2025 * The Future of LED General Lighting 2013-2025 * The Promise of OLED General...

191

Development of LED mini-Lidar  

Science Journals Connector (OSTI)

In this study, we aim to develop a mini-lidar system using a LED (Light Emitting Diode) as the light source for near-range measurement. Because LED is small size device and its...

Koyama, Moriaki; Shiina, Tatsuo

192

Generalized matrix method for calculation of internal light energy flux in mixed coherent and incoherent multilayers  

Science Journals Connector (OSTI)

A generalized matrix method to treat multilayer systems with mixed coherent and incoherent optical behavior is presented. The method is based on the calculation of the light energy...

Centurioni, Emanuele

2005-01-01T23:59:59.000Z

193

A Practical Primer to LED Technology  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

2011 LED Transformations, LLC 2011 LED Transformations, LLC 1 LED Lighting: A Practical Overview DOE Project Management Workshop March 15, 2011 Dr. John W. Curran, President, LED Transformations, LLC On behalf of the U.S. Department of Energy ©2011 LED Transformations, LLC 2 Learning Objectives LED Lighting: A Practical Overview 1. Critical differences between SSL and other lighting technologies 2. Understanding the effect of thermal management on product lifetime 3. How to distinguish good from poor SSL products and applications Residence, Kapalua, HI ©2011 LED Transformations, LLC 3 Copyright Materials This presentation is protected by US and International copyright laws. Reproduction, distribution, display and use of the presentation without

194

LED Watch: The Outlook for LEDs  

Energy.gov (U.S. Department of Energy (DOE))

December 2014 LED Watch: The Outlook for LEDs James Brodrick, U.S. Department of Energy LD+A Magazine

195

Biomedical devices from ultraviolet LEDs  

NLE Websites -- All DOE Office Websites (Extended Search)

Biomedical devices from ultraviolet LEDs Biomedical devices from ultraviolet LEDs Light-emitting nanocrystal diodes go ultraviolet Biomedical devices with active components could be made from nanostructured systems. February 24, 2012 Researcher working with nanocrystals A researcher at LANL works with nanocrystals. Get Expertise Researcher Sergio Brovelli Physical Chem & Applied Spectroscopy Email Research Team Leader Alberto Paleari University of Milano-Bicocca in Italy Such devices could, for example, selectively activate light-sensitive drugs for better medical treatment or probe for the presence of fluorescent markers in medical diagnostics. LEDs produce light in the ultraviolet range A process for creating glass-based, inorganic light-emitting diodes (LEDs) that produce light in the ultraviolet range has been developed by a

196

100 LPW 800 Lm Warm White LED  

SciTech Connect

An illumination grade warm white (WW) LED, having correlated color temperature (CCT) between 2800 K and 3500K and capable of producing 800 lm output at 100 lm/W, has been developed in this program. The high power WW LED is an ideal source for use as replacement for incandescent, and Halogen reflector and general purpose lamps of similar lumen value. Over the two year period, we have made following accomplishments: developed a high power warm white LED product and made over 50% improvements in light output and efficacy. The new high power WW LED product is a die on ceramic surface mountable LED package. It has four 1x1 mm{sup 2} InGaN pump dice flip chip attached to a ceramic submount in 2x2 array, covered by warm white phosphor ceramic platelets called Lumiramicâ?˘ and an overmolded silicone lens encapsulating the LED array. The performance goal was achieved through breakthroughs in following key areas: (1) High efficiency pump LED development through pump LED active region design and epi growth quality improvement (funded by internal programs). (2) Increase in injection efficiency (IE) represented by reduction in forward voltage (V{sub f}) through the improvement of the silver-based p-contact and a reduction in spreading resistance. The injection efficiency was increased from 80% at the start of the program to 96% at the end of the program at 700 mA/mm{sup 2}. (3) Improvement in thermal design as represented by reduction in thermal resistance from junction to case, through improvement of the die to submount connection in the thin film flip chip (TFFC) LED and choosing the submount material of high thermal conductivity. A thermal resistance of 1.72 K/W was demonstrated for the high power LED package. (4) Improvement in extraction efficiency from the LED package through improvement of InGaN die level and package level optical extraction efficiency improvement. (5) Improvement in phosphor system efficiency by improving the lumen equivalent (LE) and phosphor package efficiency (PPE) through improvement in phosphor-package interactions. Another achievement in the development of the phosphor integration technology is the demonstration of tight color control. The high power WW LED product developed has been proven to have good reliability. The manufacturing of the product will be done in Philips Lumiledsâ?? LUXEON Rebel production line which has produced billions of high power LEDs. The first high power WW LED product will be released to the market in 2011.

Decai Sun

2010-10-31T23:59:59.000Z

197

Synthesis and luminescence properties of rare earth activated phosphors for near UV-emitting LEDs for efficacious generation of white light  

E-Print Network (OSTI)

lighting using incandescent lights and fluorescent lamps, asenergy used for the incandescent lamp is wasted as infraredsource to replace incandescent and fluorescent lighting [2].

Han, Jinkyu

2013-01-01T23:59:59.000Z

198

An Engineering-Economic Analysis of White Light-Emitting Diodes for General  

NLE Websites -- All DOE Office Websites (Extended Search)

An Engineering-Economic Analysis of White Light-Emitting Diodes for General An Engineering-Economic Analysis of White Light-Emitting Diodes for General Illumination for the U.S. Residential and Commercial Sectors Speaker(s): InĂŞs Magarida Lima de Azevedo Date: February 15, 2008 - 12:00pm Location: 90-3122 Because lighting constitutes more than 20% of total US electricity consumption, and many current lighting technologies are highly inefficient, improved technologies for lighting hold great potential for energy savings and for reducing associated greenhouse gas emissions. Solid-state lighting is a technology that shows great promise as a source of efficient, affordable, color-balanced white light in the near future. Indeed, under a pure engineering-economic analysis, solid-state lighting already performs better than incandescent bulbs and is expected to surpass the most

199

Vapochromic LED  

DOE Patents (OSTI)

A sandwich device was prepared by electrodeposition of an insoluble layer of oligomerized tris(4-(2-thienyl)phenyl)amine onto conducting indium-tin oxide coated glass, spin coating the stacked platinum compound, tetrakis(p-decylphenylisocyano)platinum tetranitroplatinate, from toluene onto the oligomer layer, and then coating the platinum complex with aluminum by vapor deposition. This device showed rectification of current and gave electroluminescence. The electroluminescence spectrum (.mu..sub.max =545 nm) corresponded to the photoluminescence spectrum of the platinum complex. Exposure of the device to acetone vapor caused the electroemission to shift to 575 nm. Exposure to toluene vapor caused a return to the original spectrum. These results demonstrate a new type of sensor that reports the arrival of organic vapors with an electroluminescent signal. The sensor comprises (a) a first electrode; (b) a hole transport layer formed on the first electrode; (c) a sensing/emitting layer formed on the hole transport layer, the sensing/emitting layer comprising a material that changes color upon exposure to the analyte vapors; (d) an electron conductor layer formed on the sensing layer; and (e) a second electrode formed on the electron conductor layer. The hole transport layer emits light at a shorter wavelength than the sensing/emitting layer and at least the first electrode comprises an optically transparent material.

Kunugi, Yoshihito (Hiroshima, JP); Mann, Kent R. (North Oaks, MN); Miller, Larry L. (Minnetonka, MN); Exstrom, Christopher L. (Kearney, NE)

2002-01-15T23:59:59.000Z

200

Vapochromic LED  

DOE Patents (OSTI)

A sandwich device was prepared by electrodeposition of an insoluble layer of oligomerized tris(4-(2-thienyl)phenyl)amine onto conducting indium-tin oxide coated glass, spin coating the stacked platinum compound, tetrakis(p-decylphenylisocyano)platinum tetranitroplatinate, from toluene onto the oligomer layer, and then coating the platinum complex with aluminum by vapor deposition. This device showed rectification of current and gave electroluminescence. The electroluminescence spectrum (.lambda..sub.max =545 nm) corresponded to the photoluminescence spectrum of the platinum complex. Exposure of the device to acetone vapor caused the electroemission to shift to 575 nm. Exposure to toluene vapor caused a return to the original spectrum. These results demonstrate a new type of sensor that reports the arrival of organic vapors with an electroluminescent signal. The sensor comprises (a) a first electrode; (b) a hole transport layer formed on the first electrode; (c) a sensing/emitting layer formed on the hole transport layer, the sensing/emitting layer comprising a material that changes color upon exposure to the analyte vapors; (d) an electron conductor layer formed on the sensing layer; and (e) a second electrode formed on the electron conductor layer. The hole transport layer emits light at a shorter wavelength than the sensing/emitting layer and at least the first electrode comprises an optically transparent material.

Kunugi, Yoshihito (Hiroshima, JP); Mann, Kent R. (North Oaks, MN); Miller, Larry L. (Minnetonka, MN); Exstrom, Christopher L. (Kearney, NE)

2003-06-17T23:59:59.000Z

Note: This page contains sample records for the topic "led general lighting" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


201

Solid-State Lighting: Market Challenges  

NLE Websites -- All DOE Office Websites (Extended Search)

Market Challenges to someone by Market Challenges to someone by E-mail Share Solid-State Lighting: Market Challenges on Facebook Tweet about Solid-State Lighting: Market Challenges on Twitter Bookmark Solid-State Lighting: Market Challenges on Google Bookmark Solid-State Lighting: Market Challenges on Delicious Rank Solid-State Lighting: Market Challenges on Digg Find More places to share Solid-State Lighting: Market Challenges on AddThis.com... Why SSL LED Basics OLED Basics Using LEDs R&D Challenges Market Challenges Market Challenges Resources Compact Fluorescent Lighting in America PDF Guiding Market Introduction of SSL Products PDF LED Directional Lamps PDF LED MR16 Lamps Recessed LED Downlights PDF General Service LED Lamps PDF What to Ask - A Checklist for Buyers of LED Lighting Products PDF

202

Sandia National Laboratories: Blue LED  

NLE Websites -- All DOE Office Websites (Extended Search)

electroluminescence was first reported by H.J. Round in 1907, and the first light-emitting diode (LED) was reported by O.V. Losev in 1927. Not until the birth of semiconductor...

203

Sandia National Laboratories: Red LED  

NLE Websites -- All DOE Office Websites (Extended Search)

electroluminescence was first reported by H.J. Round in 1907, and the first light-emitting diode (LED) was reported by O.V. Losev in 1927. Not until the birth of semiconductor...

204

Sandia National Laboratories: white LED  

NLE Websites -- All DOE Office Websites (Extended Search)

white LED Brief History of Solid-State Lighting Technology On June 5, 2013, in Semiconductor electroluminescence was first reported by H.J. Round in 1907, and the first...

205

Energy Savings Potential for Street Lighting in India  

E-Print Network (OSTI)

2013. [30] R. Banham, “LED Street Lights Investment Cost andGeneral Review. 2012. “Street lights to be repaired by10-21/chandigarh/34626751_1_street-lights- repair-municipal-

Johnson, Alissa K.

2014-01-01T23:59:59.000Z

206

Advanced Leds | Open Energy Information  

Open Energy Info (EERE)

Leds Leds Jump to: navigation, search Name Advanced Leds Place Coventry, England, United Kingdom Zip CV5 6SP Product Advanced Leds develops LED technology for outdoor lighting, including street lighting applications. Coordinates 44.866737°, -72.263927° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":44.866737,"lon":-72.263927,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

207

Special and general relativity extended to allow for a variable light speed  

E-Print Network (OSTI)

There have been a number of papers proposing that the light speed of a homogeneous and isotropic universe is variable. This paper outlines a simple way that the vectors and tensors of special relativity can be extended to allow such a variable light speed and show how the field equation of general relativity can also be extended with particular application to such a universe.

Robert C. Fletcher

2006-06-21T23:59:59.000Z

208

Lighting Test Facilities  

NLE Websites -- All DOE Office Websites (Extended Search)

Custom Projects Lighting Test Facilities SSL Guidelines Industrial Federal Agriculture LED Street and Area Lighting Field Test of Exterior LED Down Lights Abstract Outdoor...

209

Model Specification for LED Roadway Luminaires  

Energy.gov (U.S. Department of Energy (DOE))

The DOE Municipal Solid-State Street Lighting Consortium's Model Specification for LED Roadway Luminaires enables cities, utilities, and other state and local agencies to assemble effective bid...

210

Dimming LEDs: What You Need to Know  

Energy.gov (U.S. Department of Energy (DOE))

This December 10, 2012 webcast presented information on the challenges and opportunities facing users trying to dim LED light sources today, reviewing the major types of deployed dimming...

211

LED Replacements for Linear Fluorescent Lamps Webcast  

Energy.gov (U.S. Department of Energy (DOE))

In this June 20, 2011 webcast on LED products marketed as replacements for linear fluorescent lamps, Jason Tuenge of the Pacific Northwest National Laboratory (PNNL) discussed current Lighting...

212

Model Specification for LED Roadway Luminaires Webcast  

Energy.gov (U.S. Department of Energy (DOE))

This November 15, 2011 webcast presented information about the Model Specification for LED Roadway Luminaires developed by DOE's Municipal Solid-State Street Lighting Consortium. During the webcast...

213

LED LUMINAIRE LIFETIME: Recommendations for Testing and Reporting...  

Office of Environmental Management (EM)

LED LUMINAIRE LIFETIME: Recommendations for Testing and Reporting LED LUMINAIRE LIFETIME: Recommendations for Testing and Reporting 2011 Solid-State Lighting Product Quality...

214

Superieur lichtbereik dankzij dubbele LED module  

Science Journals Connector (OSTI)

GC Europe introduceert een nieuw concept voor lichtuitharding. De GC G-Light heeft een LED module met twee typen dioden. Met een...GC G-Light een hoge lichtopbrengst voor het uitharden van dental...

   

2005-08-01T23:59:59.000Z

215

LED structure with enhanced mirror reflectivity  

DOE Patents (OSTI)

Embodiments of the present invention are generally related to LED chips having improved overall emission by reducing the light-absorbing effects of barrier layers adjacent mirror contacts. In one embodiment, a LED chip comprises one or more LEDs, with each LED having an active region, a first contact under the active region having a highly reflective mirror, and a barrier layer adjacent the mirror. The barrier layer is smaller than the mirror such that it does not extend beyond the periphery of the mirror. In another possible embodiment, an insulator is further provided, with the insulator adjacent the barrier layer and adjacent portions of the mirror not contacted by the active region or by the barrier layer. In yet another embodiment, a second contact is provided on the active region. In a further embodiment, the barrier layer is smaller than the mirror such that the periphery of the mirror is at least 40% free of the barrier layer, and the second contact is below the first contact and accessible from the bottom of the chip.

Bergmann, Michael; Donofrio, Matthew; Heikman, Sten; Schneider, Kevin S; Haberern, Kevin W; Edmond, John A

2014-04-01T23:59:59.000Z

216

EECBG Success Story: Small Nebraska Town Welcomes LEDs and Energy...  

Energy Savers (EERE)

LEDs and Energy Savings November 9, 2010 - 5:21pm Addthis Tecumseh is installing 95 new LED light fixtures throughout the town. | File photo Tecumseh is installing 95 new LED...

217

Multicolor, High Efficiency, Nanotextured LEDs  

SciTech Connect

We report on research results in this project which synergize advanced material science approaches with fundamental optical physics concepts pertaining to light-matter interaction, with the goal of solving seminal problems for the development of very high performance light emitting diodes (LEDs) in the blue and green for Solid State Lighting applications. Accomplishments in the duration of the contract period include (i) heteroepitaxy of nitrogen-polar LEDs on sapphire, (ii) heteroepitaxy of semipolar (11{bar 2}2) green LEDs on sapphire, (iii) synthesis of quantum-dot loaded nanoporous GaN that emits white light without phosphor conversion, (iv) demonstration of the highest quality semipolar (11{bar 2}2) GaN on sapphire using orientation-controlled epitaxy, (v) synthesis of nanoscale GaN and InGaN medium, and (vi) development of a novel liftoff process for manufacturing GaN thin-film vertical LEDs. The body of results is presented in this report shows how a solid foundation has been laid, with several noticeable accomplishments, for innovative research, consistent with the stated milestones.

Jung Han; Arto Nurmikko

2011-09-30T23:59:59.000Z

218

LEDs_2LEDs_2 radiative recombination efficiency  

E-Print Network (OSTI)

· heterojunction band diagrams · current efficiency · extraction efficiency · wall-plug efficiency #12;2 Non. 8.1] #12;6 Materials for highMaterials for high--brightnessbrightness LEDsLEDsSecs. 8.1, 8.2.1 Why system Gas handling system Computer Control Reactor #12;8 Examples ofExamples of colourcolour

Pulfrey, David L.

219

New reversing design method for LED uniform illumination  

Science Journals Connector (OSTI)

In light-emitting diode (LED) applications, it is becoming a big issue that how to optimize light intensity distribution curve (LIDC) and design corresponding optical component to...

Wang, Kai; Wu, Dan; Qin, Zong; Chen, Fei; Luo, Xiaobing; Liu, Sheng

2011-01-01T23:59:59.000Z

220

Perihelion precession and deflection of light in the general spherically symmetric spacetime  

E-Print Network (OSTI)

In this paper, the perihelion precession and deflection of light have been investigated in the 4-dimensional general spherically symmetric spacetime, and the main equation is obtained. As the application of this main equation, the Reissner-Nordstorm-AdS solution and Clifton-Barrow solution in $f(R)$ gravity have been taken for the examples. We find that both the electric charge and $f(R)$ gravity can affect the perihelion precession and deflection of light, while the cosmological constant can only effect the perihelion precession. Moreover, we clarify a subtlety in the deflection of light in the solar system that the possible sun's electric charge is usually used to interpret the gap between the experiment data and theoretical result. However, after also considering the effect from the sun's same electric charge on the perihelion precession of Mercury, we can find that it is not the truth.

Ya-Peng Hu; Hongsheng Zhang; Jun-Peng Hou; Liang-Zun Tang

2014-11-27T23:59:59.000Z

Note: This page contains sample records for the topic "led general lighting" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


221

Student led part Introduction  

E-Print Network (OSTI)

Overview Student led part Introduction Mathematical Biology ­ Matrix Population Projection Models;Overview Student led part Introduction The second lecture focuses on matrix (P)opulation (P)rojection (M)odels­ Stuart Townley Math Bio ­ Matrix PPMs 2/ 5 #12;Overview Student led part Introduction The second lecture

Knobloch,JĂĽrgen

222

LED Dot matrix text recognition method in natural scene  

Science Journals Connector (OSTI)

Abstract In recent years, light-emitting diodes dot-matrix text (LED text) is being widely used for displaying information and announcements. However, there is currently no text detection system that is capable of handling LED text. Unlike general printed text, it is not easy to detect and recognize LED text due to its discontinuity. A character of the LED is generally displayed with a matrix of segments and composed with them to generate the text. Furthermore, it is necessary to detect each character from a line of LED text for creating a robust text detection system. Thus, this paper proposes a method for LED text detection and recognition in natural scene images. To perform this goal of detection and recognition of a character and text, it consists of two main steps with the following steps: the first step, a Canny edge was used to detect character pixels which appear in LED display area from scene images. The center points of edge segments are calculated. These points are merged based on their properties to generate a character candidate. In order to obtain character feature, the spatial information such as a centroid and orientation of the character candidate are used. These values are then analyzed using a k-nearest neighbor approach for classifying the character candidate as a certain alphanumeric. In the second step, the recognized characters are later combined into a text line based on the similarity of their characteristics such as width, height, aspect ratio and color. The post-processing of text line generating is then applied for rectifying the falsely recognized characters. In experiments, our proposed method achieves 68.8% and 47% for detection and recognition rate, respectively. These results show the robustness and effectiveness of the proposed method for detecting and recognizing the LED text in natural scene images that has filled the vacancy that the printed and dense text detection system has not covered.

Wahyono; Kanghyun Jo

2015-01-01T23:59:59.000Z

223

All inorganic colloidal quantum dot LEDs  

E-Print Network (OSTI)

This thesis presents the first colloidal quantum dot light emitting devices (QD-LEDs) with metal oxide charge transport layers. Colloidally synthesized quantum dots (QDs) have shown promise as the active material in ...

Wood, Vanessa Claire

2007-01-01T23:59:59.000Z

224

MC-CAM Research Topics Organic LEDs  

E-Print Network (OSTI)

MC-CAM Research Topics Organic LEDs Phosphors and materials for solid state lighting Battery materials with highly- controlled microstructures Next generation optical storage media Products based for advanced display technologies Mitsubishi Chemical Center for Advanced Materials MRL Building University

Bigelow, Stephen

225

LED Essentials- Technology, Applications, Advantages, Disadvantages  

Energy.gov (U.S. Department of Energy (DOE))

On October 11, 2007, Kevin Dowling, VP of Innovation for Philips Solid-State Lighting Solutions, presented a broad introduction to LED technology, and discussed the technology status, advantages...

226

Photoacoustic Gas Detection with LED QEPAS  

Science Journals Connector (OSTI)

A novel approach of QEPAS (quartz-enhanced photoacoustic spectroscopy) applying low-cost LEDs as light sources in combination with the so-called off-beam technology is presented for...

Böttger, Stefan; Angelmahr, Martin; Schade, Wolfgang

227

LED Color Stability: 10 Important Questions  

Energy.gov (U.S. Department of Energy (DOE))

This April 15, 2014 webinar examined the causes of color shift, and took a look at existing metrics used to describe color shift/color stability in LED lighting. The lumen maintenance lifetime of...

228

Solving the 'Green Gap' in LED Technology  

Energy.gov (U.S. Department of Energy (DOE))

One long-standing high-priority research area for DOE is to increase the efficiency of deep green LEDs. Although most products today use phosphor conversion (PC) to produce white light from a blue LED, having a good green source could lead to color-mixed white sources that would avoid the losses associated with the PC approach.

229

We describe the characteristics and application of a 265nm AlGaN light-emitting diode (LED) operated at 1 MHz repetition rate, 1.2 ns pulse duration, 1.32 W average power, 2.3 mW peak  

E-Print Network (OSTI)

We describe the characteristics and application of a 265nm AlGaN light-emitting diode (LEDnm bandwidth. The LED enables the fluorescence decay of weakly emitting phenylalanine to be measured and resonance energy transfer from phenylalanine to tyrosine and tryptophan, the convenience of the 265nm LED

Strathclyde, University of

230

Integrated LED Headlamp Module  

Science Journals Connector (OSTI)

LED headlamp module integrates all necessary optics, electronics, and heat management into one compact unit that fits into standard mechanical headlamp frame. It provides high beam,...

Popelek, Jan

231

Study: Environmental Benefits of LEDs Greater Than CFLs | Department of  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Study: Environmental Benefits of LEDs Greater Than CFLs Study: Environmental Benefits of LEDs Greater Than CFLs Study: Environmental Benefits of LEDs Greater Than CFLs December 9, 2013 - 4:13pm Addthis A three-part Energy Department-funded study indicates LEDs are more environmentally friendly than compact fluorescent and incandescent lights. | Energy Department graphic A three-part Energy Department-funded study indicates LEDs are more environmentally friendly than compact fluorescent and incandescent lights. | Energy Department graphic Jim Brodrick Lighting Program Manager MORE RESOURCES Find out how LED lighting works Get project planning and analysis tools Subscribe to Solid-State Lighting's email distribution list Increasingly, light emitting diode (LED) screw-based lamps are providing consumers a cost-effective and energy efficient alternative to compact

232

Study: Environmental Benefits of LEDs Greater Than CFLs | Department of  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Study: Environmental Benefits of LEDs Greater Than CFLs Study: Environmental Benefits of LEDs Greater Than CFLs Study: Environmental Benefits of LEDs Greater Than CFLs December 9, 2013 - 4:13pm Addthis A three-part Energy Department-funded study indicates LEDs are more environmentally friendly than compact fluorescent and incandescent lights. | Energy Department graphic A three-part Energy Department-funded study indicates LEDs are more environmentally friendly than compact fluorescent and incandescent lights. | Energy Department graphic Jim Brodrick Lighting Program Manager MORE RESOURCES Find out how LED lighting works Get project planning and analysis tools Subscribe to Solid-State Lighting's email distribution list Increasingly, light emitting diode (LED) screw-based lamps are providing consumers a cost-effective and energy efficient alternative to compact

233

Text-Alternative Version: Challenges in LED Research and Development  

Energy.gov (U.S. Department of Energy (DOE))

Narrator: LEDs have made remarkable progress in the past decade and gained a strong foothold in the US marketplace. In 2012, LED lighting saved an estimated 71 trillion BTUs, equivalent to annual...

234

A model for LED spectra at different drive currents  

Science Journals Connector (OSTI)

A mathematical model for the spectra of monocolor light-emitting diodes (LEDs) and phosphor-coated white LEDs at different drive currents is established. The simulation program of the...

He, Guoxin; Zheng, Lihong

2010-01-01T23:59:59.000Z

235

Model Specification for LED Roadway Luminaires, V2.0  

Energy.gov (U.S. Department of Energy (DOE))

Version 2.0 of the Model Specification for LED Roadway Luminaires is now available. Changes are substantial and include streamlined structure and formatting, new diagrams, updated references, and leveraging of LED Lighting Facts® program guidance.

236

Building highly efficient LEDs in the yellow-green spectrum  

SciTech Connect

Argonne and Purdue researchers are peering deep into the atomic structure and composition of LED lights in order to build highly efficient LEDs in the yellow-green spectrum.

None

2012-01-01T23:59:59.000Z

237

THE LUMINA PROJECT http://light.lbl.gov  

E-Print Network (OSTI)

based lighting products hold promise for replacing and/or augmenting their current fuel-based lighting batteries. It impacts the lighting service cost per unit time if charging is done with purchased electricity, batteries, or charging services. The concept is illustrated in figure 1: LED lighting products are generally

Jacobson, Arne

238

Thermal optimization of high power LED arrays with a fin cooling system  

Science Journals Connector (OSTI)

In this paper, we describe an optimization process of thermal design for the light lamp which utilizes the Light Emitting Diode (LED) module as a lighting source. The thermal performance of the LED module was sho...

Sun Ho Jang; Moo Whan Shin

2011-10-01T23:59:59.000Z

239

Embodied Energy and Off-Grid Lighting  

E-Print Network (OSTI)

solar and wind energy systems. 7 If anticipated improvements in LED lighting system performance (Lighting Africa,

Alstone, Peter

2012-01-01T23:59:59.000Z

240

LEd:JCD  

Office of Legacy Management (LM)

LEd:JCD TO- 54 k-sour R3scsrck Fouadatlon 0f..&+0istlstituta of TecGJlow Tecmolocy Csilter 10 Zest 35th Stmet ', cxk3go lo, I3.Umie Atteqtion: MC. R. c. Barrall Gentlemen:...

Note: This page contains sample records for the topic "led general lighting" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


241

LED / Lighting Ultrafast Submicron Thermoreflectance Imaging  

E-Print Network (OSTI)

This Both the miniaturization of electronic and optoelectronic devices and circuits and the increased. For optoelectronic devices, an additional scheme is required to separate electro-luminescence and the reflected

242

Nonstandard Analysis Applied to Special and General Relativity - The Theory of Infinitesimal Light-Clocks  

E-Print Network (OSTI)

Nonstandard analysis and electromagnetic propagation properties are used to derive all of the fundamental results for the Special Theory of Relativity. Infinitesimal modeling via infinitesimal light-clocks is used to derive two general line-elements (metrics) without the use of Riemannian geometry. By substituting potential velocities, the Schwarzschild, quasi and modified Schwarzschild, de Sitter, Robertson-Walker and similar line-elements are derived. New black hole and quasi-white hole investigations are presented. A new fixed method using separating operators is used to obtain the major predictions for the relativistic alterations in natural-system behavior. The major conclusion is that all such changes are related to electromagnetic properties and that Riemannian geometry is but an analogue model for natural-system behavior.

Robert A. Herrmann

2014-02-14T23:59:59.000Z

243

White LED for general illumination applications  

E-Print Network (OSTI)

In the 21st century, mankind faces problem of energy crisis through depletion of fossil fuels as well as global warning through the production of excessive greenhouse gases. Hence, there is an urgent need to look for new ...

Li, Fung Yuen Ken

2007-01-01T23:59:59.000Z

244

Dimmable AC LED Driver With Efficiency Improved Based on Switched LED Module  

Science Journals Connector (OSTI)

In this paper, one AC light-emitting diode (LED) driver with high power factor (PF) and low total harmonic distortion (THD) is adopted, which is added with the proposed...

Hwu, K I; Tu, W C; Fang, Y T

2014-01-01T23:59:59.000Z

245

The City of Los Angeles LED Streetlight Program  

Energy.gov (U.S. Department of Energy (DOE))

View the video about the Los Angeles LED streetlight program, featuring an interview with City of Los Angeles Bureau of Street Lighting Director, Ed Ebrahimian.

246

Excellent color rendering indexes of multi-package white LEDs  

Science Journals Connector (OSTI)

This study introduces multi-package white light-emitting diodes (LEDs) system with the ability to realize high luminous efficacy and an excellent color rendering index (CRI,...

Oh, Ji Hye; Yang, Su Ji; Sung, Yeon-Goog; Do, Y R

2012-01-01T23:59:59.000Z

247

Minimal Viewing Distance Calculation in LED Display Panels  

Science Journals Connector (OSTI)

Light-emitting diode (LED) display panels have received more attention recently. These panels usually are placed in public places such as streets, ...

Nazeran Motlagh, A Ali; Hashemi, B Massoud Reza

2010-01-01T23:59:59.000Z

248

LED MR16 Lamps  

Energy.gov (U.S. Department of Energy (DOE))

The following CALiPER report provides detailed analysis of LED MR16 lamp performance, covering basic performance characteristics as well as subjective evaluation of beam, shadow, and color quality. Pending reports will offer analysis on performance attributes that are not captured by LM-79 testing. These reports are intended to educate the industry on market trends, potential issues, and important areas for improvement.

249

EECBG Success Story: LEDs Ready for Takeoff at Louisiana Airport  

Energy.gov (U.S. Department of Energy (DOE))

About 250 lights along the taxiway at Hammond Northshore Regional Airport in Louisiana are being replaced with light-emitting diodes (LEDs) with funds from an Energy Efficiency and Conservation Block Grant (EECBG). Learn more.

250

Observed Minimum Illuminance Threshold for Night Market Vendors in Kenya who use LED Lamps  

SciTech Connect

Creation of light for work, socializing, and general illumination is a fundamental application of technology around the world. For those who lack access to electricity, an emerging and diverse range of LED based lighting products hold promise for replacing and/or augmenting their current fuel-based lighting sources that are costly and dirty. Along with analysis of environmental factors, economic models for total cost-ofownership of LED lighting products are an important tool for studying the impacts of these products as they emerge in markets of developing countries. One important metric in those models is the minimum illuminance demanded by end-users for a given task before recharging the lamp or replacing batteries. It impacts the lighting service cost per unit time if charging is done with purchased electricity, batteries, or charging services. The concept is illustrated in figure 1: LED lighting products are generally brightest immediately after the battery is charged or replaced and the illuminance degrades as the battery is discharged. When a minimum threshold level of illuminance is reached, the operational time for the battery charge cycle is over. The cost to recharge depends on the method utilized; these include charging at a shop at a fixed price per charge, charging on personal grid connections, using solar chargers, and purchasing dry cell batteries. This Research Note reports on the observed"charge-triggering" illuminance level threshold for night market vendors who use LED lighting products to provide general and task oriented illumination. All the study participants charged with AC power, either at a fixed-price charge shop or with electricity at their home.

Johnstone, Peter; Jacobson, Arne; Mills, Evan; Radecsky, Kristen

2009-03-21T23:59:59.000Z

251

Reducing LED Costs Through Innovation | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Reducing LED Costs Through Innovation Reducing LED Costs Through Innovation Reducing LED Costs Through Innovation November 19, 2013 - 3:49pm Addthis A combination solid-state laser turret cutter and stamping machine cuts a thin steel plate that will be formed into lighting fixture housing. Wisconsin-based Eaton Corporation is developing a new manufacturing process that streamlines LED fixture designs. | Photo courtesy of Eaton Corporation A combination solid-state laser turret cutter and stamping machine cuts a thin steel plate that will be formed into lighting fixture housing. Wisconsin-based Eaton Corporation is developing a new manufacturing process that streamlines LED fixture designs. | Photo courtesy of Eaton Corporation A goniometer measures the photometric output distribution of an outdoor LED street light fixture. Researchers at Eaton are developing a new manufacturing process will enable LED chips to sit directly on heat sinks, improving heat transfer. | Photo courtesy of Eaton Corporation

252

LED PAR38 Lamps  

Energy.gov (U.S. Department of Energy (DOE))

The following CALiPER reports provide detailed analysis of LED PAR38 lamp performance, covering basic performance characteristics as well as subjective evaluation of beam, shadow, and color quality. Pending reports will offer analysis on flicker, dimming and power quality characteristics; stress testing; and lumen and chromaticity maintenance. These reports are intended to educate the industry on market trends, potential issues, and important areas for improvement.

253

LED Price Tracking Form  

Energy.gov (U.S. Department of Energy (DOE))

DOE intends to update the SSL Pricing and Efficacy Trend Analysis for Utility Program Planning report on an annual basis, but doing so requires that we have sufficient product and purchase data including acquisition date, purchase price, product category, and rated initial lumens. Those interested in helping collect this data are asked to use the LED Price Tracking FormMicrosoft Excel and follow the instructions for submitting data.

254

Wisconsin LED Plant Benefits from Recovery Act | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Wisconsin LED Plant Benefits from Recovery Act Wisconsin LED Plant Benefits from Recovery Act Wisconsin LED Plant Benefits from Recovery Act April 1, 2010 - 6:58pm Addthis Stephen Graff Former Writer & editor for Energy Empowers, EERE What does this mean for me? LED lights emit more light, have a longer life and provide anywhere from 50 to 70 percent in energy savings. Rudd Lighting has seen a boost from cities tapping Recovery Act funds and seeking energy efficient lighting that will reduce costs. The BetalLED facility, which produced hundreds of thousands of LED products last year, employs about 600 people, and for every job in the plant, eight to 10 more are created outside the company. Workers at a Racine, Wis., manufacturing company are busy filling orders for American cities seeking to brighten their communities with energy

255

Wisconsin LED Plant Benefits from Recovery Act | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Wisconsin LED Plant Benefits from Recovery Act Wisconsin LED Plant Benefits from Recovery Act Wisconsin LED Plant Benefits from Recovery Act April 1, 2010 - 6:58pm Addthis Stephen Graff Former Writer & editor for Energy Empowers, EERE What does this mean for me? LED lights emit more light, have a longer life and provide anywhere from 50 to 70 percent in energy savings. Rudd Lighting has seen a boost from cities tapping Recovery Act funds and seeking energy efficient lighting that will reduce costs. The BetalLED facility, which produced hundreds of thousands of LED products last year, employs about 600 people, and for every job in the plant, eight to 10 more are created outside the company. Workers at a Racine, Wis., manufacturing company are busy filling orders for American cities seeking to brighten their communities with energy

256

SunLed Technologies | Open Energy Information  

Open Energy Info (EERE)

SunLed Technologies SunLed Technologies Jump to: navigation, search Name SunLed Technologies Place Hyderabad, Andhra Pradesh, India Zip 500 034 Sector Solar Product Hyderabad-based end-to-end energy efficient lighting solution provider and ESCO focused on LEDs and solar power. Coordinates 17.6726°, 77.5971° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":17.6726,"lon":77.5971,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

257

Lighting  

SciTech Connect

The lighting section of ASHRAE standard 90.1 is discussed. It applies to all new buildings except low-rise residential, while excluding specialty lighting applications such as signage, art exhibits, theatrical productions, medical and dental tasks, and others. In addition, lighting for indoor plant growth is excluded if designed to operate only between 10 p.m. and 6 a.m. Lighting allowances for the interior of a building are determined by the use of the system performance path unless the space functions are not fully known, such as during the initial stages of design or for speculative buildings. In such cases, the prescriptive path is available. Lighting allowances for the exterior of all buildings are determined by a table of unit power allowances. A new addition the exterior lighting procedure is the inclusion of facade lighting. However, it is no longer possible to trade-off power allotted for the exterior with the interior of a building or vice versa. A significant change is the new emphasis on lighting controls.

McKay, H.N. (Hayden McKay Lighting Design, New York, NY (US))

1990-02-01T23:59:59.000Z

258

Analysis of Minimum Efficiency Performance Standards for Residential General Service Lighting in Chile  

E-Print Network (OSTI)

phasing out the use of incandescent lamps. Following majorproposed phase out of incandescent bulbs in Chile. 2 Lifeless energy: here incandescent lights (IL) are evaluated

Letschert, Virginie E.

2012-01-01T23:59:59.000Z

259

Embodied Energy and Off-Grid Lighting  

E-Print Network (OSTI)

Solar LED Task Light Embodied Energy We estimated theTable 1: Embodied energy in LED task lights and chargingLED lights that we evaluated, indicating that the energy

Alstone, Peter

2012-01-01T23:59:59.000Z

260

LEDs Ready for Takeoff at Louisiana Airport | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

LEDs Ready for Takeoff at Louisiana Airport LEDs Ready for Takeoff at Louisiana Airport LEDs Ready for Takeoff at Louisiana Airport July 14, 2010 - 3:34pm Addthis Hammond, La., airport is replacing the existing incandescent taxiway lights (pictured) with LEDs. | Photo courtesy of Hammond Northshore Regional Airport Hammond, La., airport is replacing the existing incandescent taxiway lights (pictured) with LEDs. | Photo courtesy of Hammond Northshore Regional Airport Stephen Graff Former Writer & editor for Energy Empowers, EERE What are the key facts? Upgrades for safety, energy at Hammond airport possible through Recovery Act Taxiway lights to be replaced with LEDs Airport could save up to $15,000 annually on electric bills Energy efficiency is taking off at the airport in Hammond, La., about 70

Note: This page contains sample records for the topic "led general lighting" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


261

LEDs Ready for Takeoff at Louisiana Airport | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

LEDs Ready for Takeoff at Louisiana Airport LEDs Ready for Takeoff at Louisiana Airport LEDs Ready for Takeoff at Louisiana Airport July 14, 2010 - 3:34pm Addthis Hammond, La., airport is replacing the existing incandescent taxiway lights (pictured) with LEDs. | Photo courtesy of Hammond Northshore Regional Airport Hammond, La., airport is replacing the existing incandescent taxiway lights (pictured) with LEDs. | Photo courtesy of Hammond Northshore Regional Airport Stephen Graff Former Writer & editor for Energy Empowers, EERE What are the key facts? Upgrades for safety, energy at Hammond airport possible through Recovery Act Taxiway lights to be replaced with LEDs Airport could save up to $15,000 annually on electric bills Energy efficiency is taking off at the airport in Hammond, La., about 70

262

Cree Sets New Benchmarks for LED Efficacy and Brightness  

Energy.gov (U.S. Department of Energy (DOE))

Cree has successfully created a cool white LED prototype that delivers 107 lm/W at 350mA. This achievement builds on the Cree EZBright® LED chip platform, developed in part with prior funding support from DOE. Cree made the prototype LED under their DOE project focused on developing LED chips incorporating photonic crystal elements for improved light extraction and novel package technology for higher down-conversion efficiency compared to conventional LEDs. Based on a 1 millimeter-square chip, the new prototype LED produces white light with a CCT of 5500K and a CRI of 73. Integration of four of these prototype LEDs can produce luminous flux of more than 450 lumens.

263

Novel green illumination energy for LED with ocean battery materials  

Science Journals Connector (OSTI)

This paper launches novel materials of LED with ocean battery. Ocean battery employs sea water existing by the nature as energy materials to drive LED lamp lighting. The analysing methods are thermal-, electric- and illumination-performance experiments to discuss the novel green illumination techniques. Ocean battery and LED are all DC components, there is no energy loss of current converter between them, and the ocean battery has more electricity in LED illumination. Vapour chamber (VC) and aluminium (AL) materials are assigned to be the LED PCBs. Results show that the effective thermal conductivity of the VCPCB is many times higher than that of the ALPCB, proving that it can effectively reduce the temperature of the LED and obtain more uniform luminance. And the output voltage and LED lighting start unstable resulting from the air bubble of ocean battery slight vibration.

Jung-Chang Wang

2012-01-01T23:59:59.000Z

264

Advanced Lighting Program Development (BG9702800) Final Report  

E-Print Network (OSTI)

LEDs (especially traffic light conversion) Commercial Better task and furniture-based lighting Improved streetlights

Rubinstein, Francis; Johnson, Steve

1998-01-01T23:59:59.000Z

265

Power Quality Improvements in Lighting Systems Mr. Ashish Shrivastava  

E-Print Network (OSTI)

from early incandescent lamps to present generation light emitting diodes (LEDs). Incandescent light

Kumar, M. Jagadesh

266

Outdoor Lighting Resources  

Energy.gov (U.S. Department of Energy (DOE))

DOE offers a variety of resources to guide municipalities, utilities, and others in their evaluation of LED street lighting products.

267

Solid-State Lighting | Department of Energy  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

U.S. Manufacturing. Read more Technical Brief Clarifies Misconceptions about Safety of LED Lighting Technical Brief Clarifies Misconceptions about Safety of LED Lighting Examines...

268

List of LED Exit Signs Incentives | Open Energy Information  

Open Energy Info (EERE)

LED Exit Signs Incentives LED Exit Signs Incentives Jump to: navigation, search The following contains the list of 72 LED Exit Signs Incentives. CSV (rows 1 - 72) Incentive Incentive Type Place Applicable Sector Eligible Technologies Active AEP SWEPCO - Commercial and Industrial Energy Efficiency Rebate Programs (Arkansas) Utility Rebate Program Arkansas Commercial Fed. Government Industrial Institutional Local Government Nonprofit Schools State Government Building Insulation Central Air conditioners Chillers Custom/Others pending approval Duct/Air sealing Lighting Lighting Controls/Sensors Motor VFDs Motors Roofs LED Exit Signs Commercial Refrigeration Equipment Ground Source Heat Pumps Yes APS - Energy Efficiency Solutions for Business (Arizona) Utility Rebate Program Arizona Commercial

269

Application Summary Report 22: LED MR16 Lamps  

SciTech Connect

This report analyzes the independently tested photometric performance of 27 LED MR16 lamps. It describes initial performance based on light output, efficacy, distribution, color quality, electrical characteristics, and form factor, with comparisons to a selection of benchmark halogen MR16s and ENERGY STAR qualification thresholds. Three types of products were targeted. First, CALiPER sought 3000 K lamps with the highest rated lumen output (i.e., at least 500 lm) or a claim of equivalency to a 50 W halogen MR16 or higher. The test results indicate that while the initial performance of LED MR16s has improved across the board, market-available products still do not produce the lumen output and center beam intensity of typical 50 W halogen MR16 lamps. In fact, most of the 18 lamps in this category had lower lumen output and center beam intensity than a typical 35 W halogen MR16 lamp. Second, CALiPER sought lamps with a CRI of 90 or greater. Only four manufacturers were identified with a product in this category. CALiPER testing confirmed the performance of these lamps, which are a good option for applications where high color fidelity is needed. A vast majority of the LED MR16 lamps have a CRI in the low 80s; this is generally acceptable for ambient lighting, but may not always be acceptable for focal lighting. For typical LED packages, there is a fundamental tradeoff between CRI and efficacy, but the lamps in the high-CRI group in this report still offer comparable performance to the rest of the Series 22 products in other performance areas. Finally, CALiPER sought lamps with a narrow distribution, denoted as a beam angle less than 15°. Five such lamps were purchased. Notably, no lamp was identified as having high lumen output (500 lumens or greater), high CRI (90 or greater), a narrow distribution (15° or less), and an efficacy greater than 60 lm/W. This would be an important achievement for LED MR16s especially if output could reach approximately 700 800 lumens, or the approximate equivalent of a 50 W halogen MR16 lamp. Many factors beyond photometric performance should be considered during specification. For example, performance over time, transformer and dimmer compatibility, and total system performance are all critical to a successful installation. Subsequent CALiPER reports will investigate more complex issues.

Royer, Michael P.

2014-07-23T23:59:59.000Z

270

Simple Modular LED Cost Model  

Energy.gov (U.S. Department of Energy (DOE))

The LED Cost Model, developed by the DOE Cost Modeling Working Group, provides a simplified method for analyzing the manufacturing costs of an LED package. The model focuses on the major cost...

271

Using Computation to Enhance LEDs  

NLE Websites -- All DOE Office Websites (Extended Search)

done at NERSC suggest that nanostructures half the breadth of a DNA strand could improve LED efficiency, especially in the "green gap," a portion of the spectrum where LED...

272

An Brief Overview Of Using LEDs In Lab  

E-Print Network (OSTI)

Diodes · A Light-Emitting Diode (LED) is a special type of diode that emits photons (light) when current ­ Forward biased Diode Operation 0 V 5 V Current ~0 high (too high)5 V 0 V I anode cathode #12;3 Light-Emitting

Baas, Bevan

273

I Have Seen the Light and It's Green...or Pink, or Blue, or Purple. Shucks,  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

I Have Seen the Light and It's Green...or Pink, or Blue, or Purple. I Have Seen the Light and It's Green...or Pink, or Blue, or Purple. Shucks, it's LED Solid-State Lighting. I Have Seen the Light and It's Green...or Pink, or Blue, or Purple. Shucks, it's LED Solid-State Lighting. May 5, 2009 - 5:00am Addthis John Lippert When it comes to lighting, light-emitting diodes (LEDs) are the new kid on the block. LEDs are a form of solid-state lighting. As such, they are following the example of their siblings in the computer industry, improving in performance at an astonishing pace. In this blog I'm going to cover my personal experiences with LED lighting. I'll go over LED lighting in general, providing consumer buying tips, in a future blog. You may already be using LED lighting. They have become a popular holiday lighting option around Christmas time since they consume a fraction of the

274

I Have Seen the Light and It's Green...or Pink, or Blue, or Purple. Shucks,  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Have Seen the Light and It's Green...or Pink, or Blue, or Purple. Have Seen the Light and It's Green...or Pink, or Blue, or Purple. Shucks, it's LED Solid-State Lighting. I Have Seen the Light and It's Green...or Pink, or Blue, or Purple. Shucks, it's LED Solid-State Lighting. May 5, 2009 - 5:00am Addthis John Lippert When it comes to lighting, light-emitting diodes (LEDs) are the new kid on the block. LEDs are a form of solid-state lighting. As such, they are following the example of their siblings in the computer industry, improving in performance at an astonishing pace. In this blog I'm going to cover my personal experiences with LED lighting. I'll go over LED lighting in general, providing consumer buying tips, in a future blog. You may already be using LED lighting. They have become a popular holiday lighting option around Christmas time since they consume a fraction of the

275

Applications of the Generalized DDA Formalism and the Nature of Polarized Light in Deep Oceans  

E-Print Network (OSTI)

is applied to confi rmation of irregular invisibility cloaks made from metamaterials. In the second part, radiative transfer in a coupled atmosphere-ocean system is solved to study the asymptotic nature of the polarized light in deep oceans. The rate at which...

You, Yu

2010-01-16T23:59:59.000Z

276

Direct LED writing of submicron resist patterns: Towards the fabrication of individually-addressable InGaN submicron stripe-shaped LED arrays  

Science Journals Connector (OSTI)

Submicron stripe-shaped InGaN light-emitting diode (LED) arrays with individually addressable capabilities are demonstrated ... the emission pattern, are formed by direct LED writing in a mask-free manner. The .....

Zheng Gong; Benoit Guilhabert; Zhitao Chen; Martin D. Dawson

2014-09-01T23:59:59.000Z

277

DUAL USE OF LEDS: SIGNALING AND COMMUNICATIONS IN ITS Grantham Pang, Chi-ho Chan, Hugh Liu, Thomas Kwan  

E-Print Network (OSTI)

of light-emitting diodes (LEDs) over incandescent lights is well-supported. This is due to their high shown that the high brightness LEDs are significantly brighter than the incandescent lights lights with LEDs is a reduction in power consumption [7]. In addition, incandescent traffic signals burn

Pang, Grantham

278

Phosphors for LED lamps  

SciTech Connect

A phosphor, a phosphor blend including the phosphor, a phosphor prepared by a process, and a lighting apparatus including the phosphor blend are disclosed. The phosphor has the formula (Ca.sub.1-p-qCe.sub.pK.sub.q).sub.xSc.sub.y(Si.sub.1-rGa.sub.r).sub.zO.su- b.12+.delta. or derived from a process followed using disclosed amounts of reactants. In the formula, (0

Murphy, James Edward; Manepalli, Satya Kishore; Kumar, Prasanth Nammalwar

2013-08-13T23:59:59.000Z

279

Sandia National Laboratories: AlGaAs LEDs  

NLE Websites -- All DOE Office Websites (Extended Search)

electroluminescence was first reported by H.J. Round in 1907, and the first light-emitting diode (LED) was reported by O.V. Losev in 1927. Not until the birth of semiconductor...

280

Laboratory Evaluation of LED T8 Replacement Lamp Products  

SciTech Connect

A report on a lab setting analysis involving LED lamps intended to directly replace T8 fluorescent lamps (4') showing light output, power, and economic comparisons with other fluorescent options.

Richman, Eric E.; Kinzey, Bruce R.; Miller, Naomi J.

2011-05-23T23:59:59.000Z

Note: This page contains sample records for the topic "led general lighting" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


281

Better than CFL? Dimmable LED Downlights in Hospitality Facilities Webinar  

Energy.gov (U.S. Department of Energy (DOE))

LEDs represent less than 1% of the installed base of U.S. downlights, which in 2012 numbered about 700 million. In hospitality facilities, past efforts to reduce lighting energy use have mainly...

282

Light beams with general direction and polarization: global description and geometric phase  

E-Print Network (OSTI)

We construct the manifold describing the family of plane monochromatic light waves with all directions, polarizations, phases and intensities. A smooth description of polarization, valid over the entire sphere S^2 of directions, is given through the construction of an orthogonal basis pair of complex polarization vectors for each direction; any light beam is then uniquely and smoothly specified by giving its direction and two complex amplitudes. This implies that the space of all light beams is the six dimensional manifold S^2 X C^2, the Cartesian product of a sphere and a two dimensional complex vector space. A Hopf map (i.e mapping the two complex amplitudes to the Stokes parameters) then leads to the four dimensional manifold S^2 X S^2 which describes beams with all directions and polarization states. This product of two spheres can be viewed as an ordered pair of two points on a single sphere, in contrast to earlier work in which the same system was represented using Majorana's mapping of the states of a spin one quantum system to an unordered pair of points on a sphere. This is a different manifold, CP^2, two dimensional complex projective space, which does not faithfully represent the full space of all directions and polarizations. Following the now-standard framework, we exhibit the fibre bundle whose total space is the set of all light beams of non-zero intensity, and base space S^2 X S^2. We give the U(1) connection which determines the geometric phase as the line integral of a one-form along a closed curve in the total space. Bases are classified as globally smooth, global but singular, and local, with the last type of basis being defined only when the curve traversed by the system is given. Existing as well as new formulae for the geometric phase are presented in this overall framework.

R. Nityananda; S. Sridhar

2012-12-05T23:59:59.000Z

283

Small Nebraska Town Welcomes LEDs and Energy Savings | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Nebraska Town Welcomes LEDs and Energy Savings Nebraska Town Welcomes LEDs and Energy Savings Small Nebraska Town Welcomes LEDs and Energy Savings November 9, 2010 - 2:00pm Addthis Tecumseh is installing 95 new LED light fixtures throughout the town. | File photo Tecumseh is installing 95 new LED light fixtures throughout the town. | File photo Lindsay Gsell What are the key facts? Rural Tecumseh, Neb. could save up to $6,000 annually with LED lights Tecumseh's town historic town square is home to the city hall, courthouse, post office, and during the summer months-a farmers market. Now, this historic square, built in the 1850's, is about to become home to something new: LED lights. As part of an Energy Efficiency and Conservation Block Grant through the Recovery Act, Tecumseh is planning to install 95 new LED light fixtures

284

A general relativistic model for the light propagation in the gravitational field of the Solar System: the dynamical case  

E-Print Network (OSTI)

Modern astrometry is based on angular measurements at the micro-arcsecond level. At this accuracy a fully general relativistic treatment of the data reduction is required. This paper concludes a series of articles dedicated to the problem of relativistic light propagation, presenting the final microarcsecond version of a relativistic astrometric model which enable us to trace back the light path to its emitting source throughout the non-stationary gravity field of the moving bodies in the Solar System. The previous model is used as test-bed for numerical comparisons to the present one. Here we also test different versions of the computer code implementing the model at different levels of complexity to start exploring the best trade-off between numerical efficiency and the micro-arcsecond accuracy needed to be reached.

Fernando de Felice; Alberto Vecchiato; Maria Teresa Crosta; Mario G. Lattanzi; Beatrice Bucciarelli

2006-09-04T23:59:59.000Z

285

General features of direct-cycle, supercritical-pressure, light-water-cooled reactors  

SciTech Connect

The concept of direct-cycle, supercritical-pressure, light-water-cooled reactors is developed. Breeding is possible in the tight lattice core. The power output can be maximized in the fast converter reactor. The gross thermal efficiency of the high temperature reactor adopting Inconel as fuel cladding is expected to be 44.8%. The plant system is similar to the supercritical-fossil-fired power plant which adopts once-through type coolant circulation system. The volume and height of the containment are approximately half of the BWR. The basic safety principles follows those of LWRs. The reactor will solve the economic problems of LWR and LMFBR.

Oka, Y.; Koshizuka, S. [Univ. of Tokyo (Japan). Nuclear Engineering Research Lab.

1996-07-01T23:59:59.000Z

286

Bored By Non-Glowing Skin? Ultra-Flexible, Waterproof LED Implants Are What You Seek  

E-Print Network (OSTI)

Bored By Non-Glowing Skin? Ultra-Flexible, Waterproof LED Implants Are What You Seek By Alasdair Wilkins/io9 Posted 10.19.2010 at 12:15 pm LED Lights Could Be Implanted Under Skin Photo courtesy of iO9 LEDs are, on small scales, the cheapest, most reliable, and most technologically powerful light sources

Rogers, John A.

287

Modeling of dimmable High Power LED illumination distribution using ANFIS on the isolated area  

Science Journals Connector (OSTI)

High power light emitting diodes (HP-LEDs) are more suitable for energy saving applications and have becoming replacing traditional fluorescent and incandescent bulbs for its energy efficient. Therefore, HP-LED lighting has been regarded in the next-generation ... Keywords: ANFIS, High Power LED, Illumination distribution

?smail Kiyak; Vedat Topuz; Bülent Oral

2011-09-01T23:59:59.000Z

288

LEDs and Specification for Parking Lots Lighten Energy Load | Department of  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

LEDs and Specification for Parking Lots Lighten Energy Load LEDs and Specification for Parking Lots Lighten Energy Load LEDs and Specification for Parking Lots Lighten Energy Load March 5, 2013 - 11:17am Addthis At its Supercenter in Leavenworth, Kansas—the first site to implement the LED Site Lighting Specification—Walmart anticipates energy savings of over 125,000 kWh per year and a 30% reduction in maintenance costs. In addition to parking lot lights, LED bollard lights illuminate the pedestrian walkway. Credit: Walmart At its Supercenter in Leavenworth, Kansas-the first site to implement the LED Site Lighting Specification-Walmart anticipates energy savings of over 125,000 kWh per year and a 30% reduction in maintenance costs. In addition to parking lot lights, LED bollard lights illuminate the

289

Light  

Science Journals Connector (OSTI)

Sunlight contains energy which can be directly converted into electricity in solar cells of various types. This is an example of what is called 'direct conversion', involving no moving parts or heat conversion processes. This chapter looks at photovoltaic and photoelectric devices and also at other ideas for using light energy, some of which operate in the infrared part of the spectrum. Solar electric power is a rapidly developing field, opening up many opportunities for novel applications, as well as requirements, including for storage, with one idea being solar-powered hydrogen production and then direct conversion to electricity in fuel cells. Direct conversion is not always efficient, and this chapter introduces the concept of 'energy return on energy invested'. In speculative mood this chapter also looks at the idea of a global grid, allowing daytime solar generation to be used on the night side of the planet.

David Elliott ? Pages 4-1 to 4-20

290

Microscopy refocusing and dark-field imaging by using a simple LED array  

E-Print Network (OSTI)

Microscopy refocusing and dark-field imaging by using a simple LED array Guoan Zheng,1 show that such a condenser can be replaced by a programmable LED array to achieve greater imaging], and nondiffracted Bessel beam illumination [6]. With the maturation of LED technology, the use of LEDs as the light

Yang, Changhuei

291

Highly Efficient Silicon Light Emitting Diode  

E-Print Network (OSTI)

silicon light-emitting diodes (LED) that efficiently emit photons with energy around the silicon bandgap

Leminh Holleman Wallinga; P. Leminh; J. Holleman; H. Wallinga

2000-01-01T23:59:59.000Z

292

Studying collisions in the general physics laboratory with quadrature light emitting diode sensors  

Science Journals Connector (OSTI)

We have developed the means to measure position rapidly and precisely as a function of time in the general physics laboratory. These measurements are of sufficient quality that velocities and accelerations can be calculated from the position data using numerical derivatives. The precision of the measurements is such that any disagreement between theoretical expectations and experimental measurements is less than a few percent. Measurements of the system under study can be made as rapidly as every 200 ?s which is faster than the typical time scales over which the system changes. Measuring rapidly also allows one to investigate additional phenomena not previously accessible and to see features of the physics previously unobserved. The measurement system is based on commercially available sensors computer hardware and computer software (LABVIEW™). Many general physics laboratories based on this system have been developed but only an investigation of Newton’s second law will be described here.

P. A. DeYoung; B. Mulder

2002-01-01T23:59:59.000Z

293

Low-Cost Illumination-Grade LEDs  

SciTech Connect

Solid State Lighting is a cost-effective, energy-conserving technology serving a rapidly expand- ing multi-billion dollar market. This program was designed to accelerate this lighting revolution by reducing the manufacturing cost of Illumination-Grade LEDs. The technical strategy was to investigate growth substrate alternatives to standard planar sapphire, select the most effective and compatible option, and demonstrate a significant increase in Lumen/$ with a marketable LED. The most obvious alternate substrate, silicon, was extensively studied in the first two years of the program. The superior thermal and mechanical properties of Si were expected to improve wavelength uniformity and hence color yield in the manufacture of high-power illumination- grade LEDs. However, improvements in efficiency and epitaxy uniformity on standard c-plane sapphire diminished the advantages of switching to Si. Furthermore, the cost of sapphire decreased significantly and the cost of processing Si devices using our thin film process was higher than expected. We concluded that GaN on Si was a viable technology but not a practical option for Philips Lumileds. Therefore in 2012 and 2013, we sought and received amendments which broadened the scope to include other substrates and extended the time of execution. Proprietary engineered substrates, off-axis (non-c-plane) sapphire, and c-plane patterned sapphire substrates (PSS) were all investigated in the final 18 months of this program. Excellent epitaxy quality was achieved on all three candidates; however we eliminated engineered substrates and non-c-plane sapphire because of their higher combined cost of substrate, device fabrication and packaging. Ultimately, by fabricating a flip-chip (FC) LED based upon c-plane PSS we attained a 42% reduction in LED manufacturing cost relative to our LUXEON Rebel product (Q1-2012). Combined with a flux gain from 85 to 102 Lm, the LUXEON Q delivered a 210% increase in Lm/$ over this time period. The technology was commercialized in our LUXEON Q product in Sept., 2013. Also, the retention of the sapphire increased the robustness of the device, enabling sales of low-cost submount-free chips to lighting manufacturers. Thus, blue LED die sales were initiated in the form of a PSS-FC in February, 2013.

Epler, John

2013-08-31T23:59:59.000Z

294

Lighting | Department of Energy  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

to installing LEDs in existing fixtures. Tips and Advice Tips: Lighting Lighting choices save you money. Energy-efficient light bulbs are available in a wide variety of sizes...

295

An Investigation into the Perception of Color under LED White Composite Spectra with Modulated Color Rendering  

E-Print Network (OSTI)

emitting diodes, LEDs. We examined seven LED white composite spectra with different color rendering of a pilot study that evaluates the perceptual impact of modulation of color rendering using multi-chip light

O'Reilly, Una-May

296

DOE Publishes CALiPER Snapshot Report on LED A Lamps  

Energy.gov (U.S. Department of Energy (DOE))

DOE's CALiPER program has released a Snapshot Report on LED A lamps, which utilizes the LED Lighting Facts program's extensive product database to help industry stakeholders understand the current state and trajectory of the market for that class

297

LED Frequently Asked Questions | Department of Energy  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

Frequently Asked Questions LED Frequently Asked Questions This document provides answers to LED frequently asked questions for plant-wide improvements, such as "Are LEDs ready for...

298

Energy Efficiency of LEDs | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

of LEDs Energy Efficiency of LEDs This fact sheet discusses the current state of the LED market and discusses package efficacy, luminaire efficacy, and application efficacy....

299

Sandia National Laboratories: (Lighting and) Solid-State Lighting...  

NLE Websites -- All DOE Office Websites (Extended Search)

on the third and upcoming revolution (illumination). Topics cover the basics of light-emitting diode (LED) operation; a 200-year history of lighting technology; the importance of...

300

Abstract P4-17-06: The use of specialist nurse-led clinics in preparation for reconstructive breast surgery.  

Science Journals Connector (OSTI)

...4138: Fluorescence laparoscopy with an LED light source enables fluorescence-guided...495-nm emission filter and a Stryker L9000 LED light source 24 hours after tail vein injection...Bouvet. Fluorescence laparoscopy with an LED light source enables fluorescence-guided...

AM Affan; RA Ali; JA Morton-Gittens; A Perry; A Harry; JM O'Donoghue; R Rampaul

2012-12-15T23:59:59.000Z

Note: This page contains sample records for the topic "led general lighting" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


301

Lighting Systems  

NLE Websites -- All DOE Office Websites (Extended Search)

Purple LED lamp Purple LED lamp Lighting Systems Lighting research is aimed at improving the energy efficiency of lighting systems in buildings and homes across the nation. The goal is to reduce lighting energy consumption by 50% over twenty years by improving the efficiency of light sources, and controlling and delivering illumination so that it is available, where and when needed, and at the required intensity. Research falls into four main areas: Sources and Ballasts, Light Distribution Systems, Controls and Communications, and Human Factors. Contacts Francis Rubinstein FMRubinstein@lbl.gov (510) 486-4096 Links Lighting Research Group Batteries and Fuel Cells Buildings Energy Efficiency Applications Commercial Buildings Cool Roofs and Heat Islands Demand Response Energy Efficiency Program and Market Trends

302

Maintenance Practices for LED Streetlights  

Energy.gov (U.S. Department of Energy (DOE))

This April 14, 2014 webinar answered important questions about the maintenance and reliability of LED streetlights, and how to take these issues into account when planning and preparing for a...

303

Advanced Lighting Systems | Open Energy Information  

Open Energy Info (EERE)

Minnesota Zip: 56378 Product: Advanced Lighting Systems (ALS) provides a number of LED and fiber optic lighting solutions. It was acquired by Nexxus Lighting in September...

304

Influence of the backward-pump process on photon-number squeezing in a constant-current-driven heterojunction LED: Transition from thermionic emission to diffusion limits  

Science Journals Connector (OSTI)

Physical mechanisms which limit the squeezing bandwidth in a heterojunction light-emitting diode (LED) have been extensively studied both theoretically and experimentally. It is proven that our experimental results of pump-current dependence of the squeezing bandwidth in the constant-current-driven heterojunction LED at room temperature cannot be explained by previous theoretical predictions. We present a theoretical framework, including the effects of a microscopic backward-pump (BP) process, generally applicable to a heterojunction LED. Parameters describing the relative significance of the BP process are determined by the measurements of current-versus-voltage characteristic and differential resistance of the LED, independent of the noise measurements. As a consequence, the experimental results can be explained by our model in a unified manner over a whole range of injection current, and it is clarified that the pump situation of the LED moves continuously from thermionic emission to diffusion limits with increasing pump current.

Masahide Kobayashi; Masamichi Yamanishi; Hiroyuki Sumitomo; Yutaka Kadoya

1999-12-15T23:59:59.000Z

305

Surface-Roughened Light-Emitting Diodes: An Accurate Model  

Science Journals Connector (OSTI)

Surface roughening is frequently employed to increase light extraction from light-emitting diodes (LEDs), especially in the important case of III-Nitride LEDs. We ...

David, Aurelien

2013-01-01T23:59:59.000Z

306

Performance Comparison of Bottom and Top Emitting LWIR (8 ?m) LED Devices  

Science Journals Connector (OSTI)

For similar substrate thickness, flip-chip mount bottom emitting LWIR LED device has higher light intensity than top emitting device. Enhanced emission is attributed to better cooling...

Das, Naresh C; Chang, Wayne

307

10 Mbps Ethernet Access for Indoor Personal Local Area Network based on a Phosphorescent White LED  

Science Journals Connector (OSTI)

This paper reports a visible light communication application system realizing 10 Mbps Ethernet access for indoor personal area network based on a phosphorescent white LED, operating...

Li, Honglei; Chen, Xiongbin; Tang, Danying; Chen, Hongda

308

Outdoor Solid-State Lighting Technology Deployment | Department...  

Energy Savers (EERE)

Parking Lot Lighting FEMP Acquisition Guidance for Lighting Products (Powered by LED Lighting Facts) FEMP Outdoor Solid-State Lighting Initiative: Resources for Outdoor SSL...

309

LED lamp color control system and method  

SciTech Connect

An LED lamp color control system and method including an LED lamp having an LED controller 58; and a plurality of LED channels 60 operably connected to the LED controller 58, each of the plurality of LED channels 60 having a channel switch 62 in series with at least one shunted LED circuit 83, the shunted LED circuit 83 having a shunt switch 68 in parallel with an LED source 80. The LED controller 58 determines whether the LED source 80 is in a feedback controllable range, stores measured optical flux for the LED source 80 when the LED source 80 is in the feedback controllable range, and bypasses storing the measured optical flux when the LED source 80 is not in the feedback controllable range.

Gaines, James; Clauberg, Bernd; Van Erp, Josephus A.M.

2013-02-05T23:59:59.000Z

310

LED lamp power management system and method  

DOE Patents (OSTI)

An LED lamp power management system and method including an LED lamp having an LED controller 58; a plurality of LED channels 60 operably connected to the LED controller 58, each of the plurality of LED channels 60 having a channel switch 62 in series with at least one shunted LED circuit 83, the shunted LED circuit 83 having a shunt switch 68 in parallel with an LED source 80. The LED controller 58 reduces power loss in one of the channel switch 62 and the shunt switch 68 when LED lamp electronics power loss (P.sub.loss) exceeds an LED lamp electronics power loss limit (P.sub.lim); and each of the channel switches 62 receives a channel switch control signal 63 from the LED controller 58 and each of the shunt switches 68 receives a shunt switch control signal 69 from the LED controller 58.

Gaines, James; Clauberg, Bernd; Van Erp, Josephus A. M.

2013-03-19T23:59:59.000Z

311

Logan County Coop Power & Light | Open Energy Information  

Open Energy Info (EERE)

County Coop Power & Light County Coop Power & Light Jump to: navigation, search Name Logan County Coop Power & Light Place Ohio Utility Id 11203 Utility Location Yes Ownership C NERC Location RFC NERC RFC Yes Activity Transmission Yes Activity Distribution Yes References EIA Form EIA-861 Final Data File for 2010 - File1_a[1] LinkedIn Connections CrunchBase Profile No CrunchBase profile. Create one now! This article is a stub. You can help OpenEI by expanding it. Utility Rate Schedules Grid-background.png COMMERCIAL AND GENERAL SERVICE Commercial FARM AND RESIDENTIAL SERVICE Residential LARGE POWER SERVICE Industrial Security Lighting 175 W LED Lighting Security Lighting 400 W LED Lighting Average Rates Residential: $0.1190/kWh Commercial: $0.1040/kWh Industrial: $0.0724/kWh References

312

Top 8 Things You Didn't Know About LEDs | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

8 Things You Didn't Know About LEDs 8 Things You Didn't Know About LEDs Top 8 Things You Didn't Know About LEDs June 4, 2013 - 9:20am Addthis Using funding from the Energy Department, Philips Lumileds developed the LUXEON S1000 -- a commercial LED product used in outdoor street and parking lot lighting. While small, this chip is the heart of the light and as of June 2012 was brighter than a 60-watt light bulb. | Photo courtesy of Philips Lumileds. Using funding from the Energy Department, Philips Lumileds developed the LUXEON S1000 -- a commercial LED product used in outdoor street and parking lot lighting. While small, this chip is the heart of the light and as of June 2012 was brighter than a 60-watt light bulb. | Photo courtesy of Philips Lumileds. Rebecca Matulka Rebecca Matulka Digital Communications Specialist, Office of Public Affairs

313

Top 8 Things You Didn't Know About LEDs | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

LEDs LEDs Top 8 Things You Didn't Know About LEDs June 4, 2013 - 9:20am Addthis Using funding from the Energy Department, Philips Lumileds developed the LUXEON S1000 -- a commercial LED product used in outdoor street and parking lot lighting. While small, this chip is the heart of the light and as of June 2012 was brighter than a 60-watt light bulb. | Photo courtesy of Philips Lumileds. Using funding from the Energy Department, Philips Lumileds developed the LUXEON S1000 -- a commercial LED product used in outdoor street and parking lot lighting. While small, this chip is the heart of the light and as of June 2012 was brighter than a 60-watt light bulb. | Photo courtesy of Philips Lumileds. Rebecca Matulka Rebecca Matulka Digital Communications Specialist, Office of Public Affairs

314

Locally Led Conservation The Local Work Group  

E-Print Network (OSTI)

1 Locally Led Conservation & The Local Work Group Mark Habiger NRCS #12;2 What Is "Locally Led ­ 5. Implementing solutions ­ 6. Measuring their success #12;3 The Locally Led Principle Locally led-Economic Concerns · Program Identification · Stakeholder Commitment #12;6 Who Leads the Locally Led Effort? · Local

315

Environmental factors which may have led to the appearance of colour vision  

Science Journals Connector (OSTI)

...Marshall Environmental factors which may have led to the appearance of colour vision Vadim...evolution| Environmental factors which may have led to the appearance of colour vision. | It...Light Environmental factors which may have led to the appearance of colour vision Vadim...

2000-01-01T23:59:59.000Z

316

Sensors and Actuators B 111112 (2005) 230241 Improvements in LED-based fluorescence analysis systems  

E-Print Network (OSTI)

Sensors and Actuators B 111­112 (2005) 230­241 Improvements in LED-based fluorescence analysis the stability, power output, and spectral flexibility of light emitting diode (LED)-based systems used to excite fluorescence or other forms of luminescence. LEDs are an attractive alternative to conventional white

Wilson, Denise

317

IEEE SIGNAL PROCESSING LETTERS, VOL. 18, NO. 10, OCTOBER 2011 587 Compressed LED Illumination Sensing  

E-Print Network (OSTI)

IEEE SIGNAL PROCESSING LETTERS, VOL. 18, NO. 10, OCTOBER 2011 587 Compressed LED Illumination emitting diodes (LEDs) are ca- pable of producing high intensity light across a wide spread of frequencies. This facilitates the design of the driving waveforms for the LEDs. This procedure is known as illumination sensing

Nehorai, Arye

318

Californidfsdfsdfsdfa OMNI-DIRECTIONAL LED  

E-Print Network (OSTI)

the California Energy Commission and UC Davis, with support by the U.S. Department of Energy and the National and application of energy-efficient lighting by conducting technology development and demonstrations, outreach Manager: Nicole Graeber California Lighting Technology Center University of California, Davis 633 Pena

California at Davis, University of

319

Adaptive Street Lighting Controls  

Energy.gov (U.S. Department of Energy (DOE))

This two-part DOE Municipal Solid-State Street Lighting Consortium webinar focused on LED street lighting equipped with adaptive control components. In Part I, presenters Amy Olay of the City of...

320

Modeling of dimmable High Power LED illumination distribution using ANFIS on the isolated area  

Science Journals Connector (OSTI)

High power light emitting diodes (HP-LEDs) are more suitable for energy saving applications and have becoming replacing traditional fluorescent and incandescent bulbs for its energy efficient. Therefore, HP-LED lighting has been regarded in the next-generation lighting. In this study, illumination distribution of white color HP-LED is modeled by adaptive neuro-fuzzy inference system (ANFIS) approach on the isolated area while LED head is fixed. Subtractive clustering with hybrid learning approach is used to train the realized ANFIS architectures. End of the numerous experiment we finally concluded that, ANFIS could be used to modeling the illumination distribution applications perfectly.

?smail Kiyak; Vedat Topuz; Bülent Oral

2011-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "led general lighting" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


321

Novel Applications of LEDs for Energy Savings A Systems Level View  

E-Print Network (OSTI)

product (3 production lines @ 24x5) Hg Arc Lamp (300 W/in) 65% of energy in IR UV LED Array (150 WNovel Applications of LEDs for Energy Savings A Systems Level View Santa Barbara Summit on Energy in a Round Lighting Hole? · DC device in an AC Powered World · Cool light source with thermal management

Salama, Khaled

322

Hand- en hoekstukken met LED-verlichting  

Science Journals Connector (OSTI)

Een groot voordeel van LED-verlichting is dat deze vorm van verlichting ... geeft als de conventionele verlichtingstechnieken. Daarmee is LED-licht bijna gelijk aan daglicht.

   

2009-04-01T23:59:59.000Z

323

Federally Led Accident Investigation Reports | Department of...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Federally Led Accident Investigation Reports Federally Led Accident Investigation Reports Includes Pre-March 2011 Type A Reports September 1, 1998 Type A Accident Investigation...

324

WhiteOptics' Low-Cost Reflector Composite Boosts LED Fixture Efficiency  

Energy.gov (U.S. Department of Energy (DOE))

With the help of DOE funding, WhiteOptics has developed a composite coating that can be used to improve efficiency in backlit, indirect, and cavity-mixing LED luminaire designs by maximizing light reflection and output. The highly diffuse coating, which is based on a novel high-reflectance particle technology, allows for uniform distribution of light without exaggerating the point-source nature of the LEDs, and is intended to offer an overall system cost-improving solution for LED optics.

325

SMART LIGHTING ENGINEERING RESEARCH CENTER Dr. Shiv Kalyanaraman  

E-Print Network (OSTI)

The rapidly growing global use of LEDs in automotive lighting, traffic signals and streetlights is creating

Linhardt, Robert J.

326

Small Area Array-Based LED Luminaire Design  

SciTech Connect

This report contains a summary of technical achievements during a three-year project to demonstrate high efficiency LED luminaire designs based on small area array-based gallium nitride diodes. Novel GaN-based LED array designs are described, specifically addressing the thermal, optical, electrical and mechanical requirements for the incorporation of such arrays into viable solid-state LED luminaires. This work resulted in the demonstration of an integrated luminaire prototype of 1000 lumens cool white light output with reflector shaped beams and efficacy of 89.4 lm/W at CCT of 6000oK and CRI of 73; and performance of 903 lumens warm white light output with reflector shaped beams and efficacy of 63.0 lm/W at CCT of 2800oK and CRI of 82. In addition, up to 1275 lumens cool white light output at 114.2 lm/W and 1156 lumens warm white light output at 76.5 lm/W were achieved if the reflector was not used. The success to integrate small area array-based LED designs and address thermal, optical, electrical and mechanical requirements was clearly achieved in these luminaire prototypes with outstanding performance and high efficiency.

Thomas Yuan

2008-01-09T23:59:59.000Z

327

Diagnostik-Set Göttingen auf White-LED und UV-LED-Basis  

Science Journals Connector (OSTI)

Der Handgriff wurde weiterentwickelt: Ein Wechselaufsatz ermöglicht nun ein einfaches Austauschen der White-LED und der UV-LED.

2014-09-01T23:59:59.000Z

328

Market Trial: Selling Off-Grid Lighting Products in Rural Kenya  

E-Print Network (OSTI)

people reported using an incandescent dry cell flashlightpurchasers. Type of Light  Incandescent  LED dry cell  LED LED rechargeable, and incandescent dry cell flashlights were

Tracy, Jennifer

2012-01-01T23:59:59.000Z

329

Solid-State Lighting: Solid-State Lighting Videos  

NLE Websites -- All DOE Office Websites (Extended Search)

Solid-State Lighting Videos to Solid-State Lighting Videos to someone by E-mail Share Solid-State Lighting: Solid-State Lighting Videos on Facebook Tweet about Solid-State Lighting: Solid-State Lighting Videos on Twitter Bookmark Solid-State Lighting: Solid-State Lighting Videos on Google Bookmark Solid-State Lighting: Solid-State Lighting Videos on Delicious Rank Solid-State Lighting: Solid-State Lighting Videos on Digg Find More places to share Solid-State Lighting: Solid-State Lighting Videos on AddThis.com... Conferences & Meetings Presentations Publications Webcasts Videos Tools Solid-State Lighting Videos On this page you can access DOE Solid-State Lighting (SSL) Program videos. Photo of a museum art gallery with LED lights in track fixtures overhead. The City of Los Angeles LED Streetlight Program

330

Chapter 6, Residential Lighting Evaluation Protocol: The Uniform...  

Office of Environmental Management (EM)

STAR lighting fixtures. More recently, programs are introducing solid-state light-emitting diode (LED) lamps. The future of savings claims from residential lighting programs is...

331

Energy Savings Potential for Street Lighting in India  

E-Print Network (OSTI)

savings, as less light (and less energy) can provide theconfigurations and light levels, LEDs did save energy, up toScenario Energy Use Savings (GWh) Compact fluorescent Light

Johnson, Alissa K.

2014-01-01T23:59:59.000Z

332

Solid-State Lighting | Department of Energy  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

overviewbrochurefeb2013.pdf More Documents & Publications DOE Lighting Program Update: LED Validation Activities Solid-State Lighting R&D Multi-Year Program Plan Emerging...

333

Emerging Lighting Technology | Department of Energy  

Office of Environmental Management (EM)

fupwgspring11kinzey.pdf More Documents & Publications DOE Lighting Program Update: LED Validation Activities Solid-State Lighting Federal Technology Deployment Pilot:...

334

LIGHT EMITTING DIODE (LED) TRAFFIC SIGNAL SURVEY RESULTS  

E-Print Network (OSTI)

Forest Norco Belmont El Monte Lakewood Norwalk Berkeley Encinitas Lancaster Oakdale Beverly Hills Escalon Downey Laguna Hills Newark Bell Gardens Dublin Laguna Niguel Newport Beach Bellflower El Cajon Lake Hills Glendora Mammoth Lakes Piedmont Chowchilla Grand Terrace Manhattan Beach Pismo Beach Chula Vista

335

An LED-based Flasher System for VERITAS  

E-Print Network (OSTI)

We describe a flasher system designed for use in monitoring the gains of the photomultiplier tubes used in the VERITAS gamma-ray telescopes. This system uses blue light-emitting diodes (LEDs) so it can be operated at much higher rates than a traditional laser-based system. Calibration information can be obtained with better statistical precision with reduced loss of observing time. The LEDs are also much less expensive than a laser. The design features of the new system are presented, along with measurements made with a prototype mounted on one of the VERITAS telescopes.

Hanna, D; McCutcheon, M; Nikkinen, L; 10.1016/j.nima.2009.10.107

2009-01-01T23:59:59.000Z

336

Heat dissipation performance of a high-brightness LED package assembly using high-thermal conductivity filler  

Science Journals Connector (OSTI)

This paper presents a thermal analysis and experimental validation of natural convective heat transfer of a high-brightness light-emitting diode (LED) package assembly. The substrate...

Yung, K C; Liem, H; Choy, H S

2013-01-01T23:59:59.000Z

337

Decisions that led to Y-12  

NLE Websites -- All DOE Office Websites (Extended Search)

Decisions that led to Y-12 Last week we saw the political and organizational changes that led up to the Manhattan Project being created on August 13, 1942. The S-1 Executive...

338

Gradual Spread of Market-Led Industrialization  

E-Print Network (OSTI)

Gradual Spread of Market-Led Industrialization Jeffrey D. Sachs and Xiaokai Yang CID Working Paper Paper no. 11 Gradual Spread of Market-Led Industrialization Jeffrey D. Sachs and Xiaokai Yang* Abstract the network effects of industrialization, though this function is not perfect. Hence, market led

339

Design and Application of LED Beam Display Based on LED Number Display Interface  

Science Journals Connector (OSTI)

This paper introduces a design actualizing LED beam display. The design directly used LED number display interface on single-chip micro- ... to obtain font and bit interface line through LED number display socket...

Hong Deng; Xiuhui Chang; Yanling Zhang

2012-01-01T23:59:59.000Z

340

DOE Announces Webinars on Maintenance Practices for LED Streetlights...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Maintenance Practices for LED Streetlights, LED Color Stability, and More DOE Announces Webinars on Maintenance Practices for LED Streetlights, LED Color Stability, and More April...

Note: This page contains sample records for the topic "led general lighting" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


341

A Practical Primer to LED Technology | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

A Practical Primer to LED Technology A Practical Primer to LED Technology A Practical Primer to LED Technology More Documents & Publications LED LUMINAIRE LIFETIME: Recommendations...

342

Tests gauge LED sensors for fuel-dye measurements  

SciTech Connect

The goal of this work was to develop a low cost, robust sensor to allow direct measurement of Solvent Red 164 dye concentration in off-road fuel at refineries and fuel terminals. Optical absorption sensors based on light emitting diodes (LEDs) are rugged, low-cost, have low power consumption, and can be designed to be intrinsically safe.LED-based systems have been used in a variety of chemical detection applications including heavy metals, pH, CO2, and O2. The approach for this work was to develop a sensor that could be mounted on a pipeline sight glass, precluding the need for direct contact of the sensor with the fuel. Below is described the design and testing of three different LED/photodiode sensors utilizing reflectance spectrometry for the measurement of dye concentration.

Ozanich, Richard M.; Lucke, Richard B.; Melville, Angela M.; Wright, Bob W.

2009-10-19T23:59:59.000Z

343

Photonic crystal light emitting diode.  

E-Print Network (OSTI)

?? This master's thesis describe electromagnetic simulations of a gallium antimonide (GaSb) light emitting diode, LED. A problem for such devices is that most of… (more)

Leirset, Erlend

2010-01-01T23:59:59.000Z

344

EC-LEDS Transport | Open Energy Information  

Open Energy Info (EERE)

EC-LEDS Transport EC-LEDS Transport Jump to: navigation, search Name EC-LEDS Transport Agency/Company /Organization United States Department of State Partner National Renewable Energy Laboratory Sector Climate Focus Area Transportation Topics Background analysis, Baseline projection, Co-benefits assessment, Finance, GHG inventory, Implementation, Low emission development planning, -LEDS, Policies/deployment programs Program Start 2011 Country Global References Transportation Assessment Toolkit[1] "Enhancing Capacity for Low Emission Development Strategies (EC-LEDS) is a U.S. Government initiative to support developing countries' efforts to pursue long-term, transformative development and accelerate sustainable, climate-resilient economic growth while slowing the growth of greenhouse

345

Automatic diagnosis and control of distributed solid state lighting systems  

Science Journals Connector (OSTI)

This paper describes a new design concept of automatically diagnosing and compensating LED degradations in distributed solid state lighting (SSL) systems. A failed LED may...

Dong, Jianfei; van Driel, Willem; Zhang, Guoqi

2011-01-01T23:59:59.000Z

346

Shelf life of five meat products displayed under light emitting diode or fluorescent lighting.  

E-Print Network (OSTI)

??Light emitting diode (LED) and fluorescent (FLS) lighting effects on enhanced pork loin chops, beef longissimus dorsi and semimembranosus steaks, ground beef, and ground turkey… (more)

Steele, Kyle Stover

2011-01-01T23:59:59.000Z

347

OSRAM SYLVANIA Develops High-Efficiency LED Troffer Replacement  

Energy.gov (U.S. Department of Energy (DOE))

With the help of DOE funding, OSRAM SYLVANIA is developing a high-efficiency LED 2'x2' troffer replacement that is expected to be commercially available in the spring of 2012 and to be cost-competitive with existing troffers of that size. It is projected to have a light output of up to 4,000 lumens, an efficacy of more than 100 lm/W, and a CCT of 3500K.

348

Energy-Saving Bottom-Lit LED Backlight with Angle-Control Freeform Lens  

Science Journals Connector (OSTI)

In this paper, relation of transmittance of prism sheets used in bottom-lit LED backlight on the direction of incident light was studied. Freeform lens was utilized to enhance the...

Qin, Zong; Wang, Kai; Wang, Shang; Liu, Sheng

349

Successful Selection of LED Streetlight Luminaires: Optimizing Illumination and Economic Performance  

Energy.gov (U.S. Department of Energy (DOE))

This March 6, 2013 webcast reviewed the factors involved in successful selection of LED streetlight luminaires. Presenters Eric Haugaard of Cree Lighting and Chad Stalker of Philips Lumileds guided...

350

Measurement of LED chips using a large-area silicon photodiode  

Science Journals Connector (OSTI)

We propose the output power measurement of bare-wafer/chip light-emitting diodes (LEDs) using a large-area silicon (Si) photodiode with a simple structure and high accuracy relative to...

Chou, Pei-Ting; Ying, Shang-Ping; Chen, Tzung-Te; Fu, Han-Kuei; Wang, Chien-Ping; Lee, Chih-Kung

2014-01-01T23:59:59.000Z

351

Hierarchical Reliability Model for Life Prediction of Actively Cooled LED-Based Luminaire  

Science Journals Connector (OSTI)

The interest in light-emitting diodes (LEDs) for illumination applications has been increasing continuously over the last decade due to two key attributes of long lifetime and low energy consumption compared to t...

Bong-Min Song; Bongtae Han; Avram Bar-Cohen…

2011-01-01T23:59:59.000Z

352

Spectral optimization of color temperature tunable white LEDs with excellent color rendering and luminous efficacy  

Science Journals Connector (OSTI)

The optimization model of limited luminous efficacy (LLE) for correlated color temperature (CCT) tunable phosphor-coated white light-emitting diodes (pc-W LEDs) consisting of blue...

He, Guoxing; Tang, Ju

2014-01-01T23:59:59.000Z

353

Improved color coordinates of green monochromatic pc-LED capped with a band-pass filter  

Science Journals Connector (OSTI)

This study introduces a “greener” green monochromatic phosphor-converted light-emitting diode (pc-LED) using a band-pass filter (BPF) combined with a long-pass dichroic...

Oh, Ji Hye; Yang, Su Ji; Sung, Yeon-Goog; Do, Young Rag

2013-01-01T23:59:59.000Z

354

Slutrapport for PSO 337-068 Udvikling af LED lyskilder og lamper  

E-Print Network (OSTI)

and RGB Lamps. The objective of this project was to pave the way for replacement of incandescent LED light source with an efficacy of 51 lm/W and a CRI index of 92 that can replace an incandescent

355

Text-Alternative Version: CALiPER Report Series 20 on LED PAR38 Lamps  

Energy.gov (U.S. Department of Energy (DOE))

Michael Royer, Lighting Engineer, Pacific Northwest National Laboratory: The CALiPER program looks at typical LED lamp performance attributes. As we've gone through the progression of reports, we...

356

Performance Evaluation of a LED-IT-Sensor Integrated Streetlight System in USN  

Science Journals Connector (OSTI)

Recently, with the issue of a Green-IT technology, various studies on a eco-friendly luminous source that ... of high oil price and environmental pollution, LED has made a great attention as a ... lights. In this...

Sun Jin Oh

2012-01-01T23:59:59.000Z

357

COLORIMTRIE DES LED : INCERTITUDES ET INFLUENCE DU COURANT LECTRIQUE 17 Colorimtrie des LED  

E-Print Network (OSTI)

COLORIM�TRIE DES LED : INCERTITUDES ET INFLUENCE DU COURANT �LECTRIQUE 17 N. POUSSET Colorimétrie des LED : incertitudes et influence du courant électrique LEDs colorimetry: uncertainties proximale, et indices de rendu des couleurs) de sources d'éclairage à LED, du LNE-INM/Cnam, est décrit. Les

Paris-Sud XI, Université de

358

LED Exit Signs | Open Energy Information  

Open Energy Info (EERE)

Signs Jump to: navigation, search TODO: Add description List of LED Exit Signs Incentives Retrieved from "http:en.openei.orgwindex.php?titleLEDExitSigns&oldid380629"...

359

Low Emission Development Strategies (LEDS): Technical, Institutional...  

Open Energy Info (EERE)

and Policy Lessons Jump to: navigation, search Tool Summary LAUNCH TOOL Name: Low Emission Development Strategies (LEDS): Technical, Institutional and Policy Lessons Agency...

360

A Practical Primer to LED Technology  

Energy Savers (EERE)

- A Measurement Issue 2011 LED Transformations, LLC 17 What's Different Highest Energy Efficiency 0 20 40 60 80 100 120 140 160 White Sodium High Pressure Sodium Compact...

Note: This page contains sample records for the topic "led general lighting" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


361

A Novel High-Power-Factor LED-Lamp Driver Based on a Single-Stage Power Conversion  

Science Journals Connector (OSTI)

This paper proposes a novel single-stage driver for supplying a T8-type light-emitting diode (LED) lamp with high power factor. The presented driver integrates a dual buck-boost converter with coupled inductors and a half-bridge series-resonant converter ... Keywords: converter, driver, light-emitting diode (LED)

Chun An Cheng, En Chih Chang, Ching Shien Tseng, Tsung Yuan Chung

2014-06-01T23:59:59.000Z

362

Quality and Performance of LED Flashlights in Kenya: Common End User Preferences and Complaints  

SciTech Connect

Flashlights that use LED technology have quickly emerged as the dominant source of portable lighting in Kenya. While flashlights do not normally provide a substitute for kerosene and other highly inefficient fuels, they are an important early manifestation of LED lighting in the developing world that can serve as a platform - or deterrent - to the diffusion of the technology into the broader off-grid lighting market. The lead acid batteries embedded in flashlights also represent an important source of hazardous waste, and flashlight durability is thus an important determinant of the rate of waste disposal. Low-cost LED flashlights with prices from $1 to $4 are now widely available in shops and markets throughout Kenya. The increased penetration of LED technology in the flashlight market is significant, as over half of all Kenyan households report owning a flashlight (Kamfor, 2002). While this shift from conventional incandescent technology to modern LEDs may appear to be a promising development, end users that our research team interviewed expressed a number of complaints about the quality and performance of these new flashlights. This raises concerns about the interests of low-income flashlight users, and it may also indicate the onset of a broader market spoiling effect for off-grid lighting products based on LED technology (Mills and Jacobson, 2008; Lighting Africa, 2007). The quality of low-cost LED flashlights can contribute to market spoiling because these products appear to represent the first contact that most Kenyans have with LED technology. In this report, our team uses interviews with 46 end users of flashlights to collect information about their experiences, perceptions, and preferences. We focus especially on highlighting common complaints from respondents about the flashlights that they have used, as well as on noting the features that they indicated were important when evaluating the quality of a flashlight. In previous laboratory tests, researchers from our team found a wide range of quality and performance among battery powered LED lights (Granderson, et al. 2008).

Tracy, Jenny; Jacobson, Arne; Mills, Evan

2009-09-14T23:59:59.000Z

363

Review Absorbance Based Light Emitting Diode Optical Sensors and Sensing Devices  

E-Print Network (OSTI)

emitting diodes (LEDs) as light sources is one strategy, which has been successfully applied in chemical

Dermot Diamond

364

Retail Lamps Study 3.1: Dimming, Flicker, and Power Quality Characteristics of LED A Lamps.  

SciTech Connect

To date, all three reports in the retail lamps series have focused on basic performance parameters, such as lumen output, efficacy, and color quality. This report goes a step further, examining the photoelectric characteristics (i.e., dimming and flicker) of a subset of lamps from CALiPER Retails Lamps Study 3. Specifically, this report focuses on the dimming, power quality, and flicker characteristics of 14 LED A lamps, as controlled by four different retail-available dimmers. The results demonstrate notable variation across the various lamps, but little variation between the four dimmers. Overall, the LED lamps: ~tended to have higher relative light output compared to the incandescent and halogen benchmark at the same dimmer output signal (RMS voltage). The lamps’ dimming curves (i.e., the relationship between control signal and relative light output) ranged from linear to very similar to the square-law curve typical of an incandescent lamp. ~generally exhibited symmetrical behavior—the same dimming curve—when measured proceeding from maximum to minimum or minimum to maximum control signal. ~mostly dimmed below 10% of full light output, with some exceptions for specific lamp and dimmer combinations ~exhibited a range of flicker characteristics, with many comparing favorably to the level typical of a magnetically-ballasted fluorescent lamp through at least a majority of the dimming range. ~ always exceeded the relative (normalized) efficacy over the dimming range of the benchmark lamps, which rapidly decline in efficacy when they are dimmed. This report generally does not attempt to rank the performance of one product compared to another, but instead focuses on the collective performance of the group versus conventional incandescent or halogen lamps, the performance of which is likely to be the baseline for a majority of consumers. Undoubtedly, some LED lamps perform better—or more similar to conventional lamps—than others. Some perform desirably for one characteristic, but not others. Consumers (and specifiers) may have a hard time distinguishing better-performing lamps from one another; at this time, physical experimentation is likely the best evaluation tool.

Royer, Michael P.; Poplawski, Michael E.; Brown, Charles C.

2014-12-14T23:59:59.000Z

365

Residential energy-efficient lighting adoption survey  

Science Journals Connector (OSTI)

Artificial lighting has transformed how humans relate to the world, by improving productivity and making spaces habitable. The adoption of energy-efficient solid-state lighting, light emitting diodes (LED), ha...

Andrea L. Hicks; Thomas L. Theis

2014-04-01T23:59:59.000Z

366

A practical means for calibrating an LED-based photometric stereo system  

Science Journals Connector (OSTI)

Abstract Conventional Photometric Stereo (PS) techniques are usually based on the assumption that the light sources are assumed sufficiently far from the object that all incoming light can be modeled using parallel rays. Meanwhile, for near-field lighting conditions the light sources are close to the object so the parallel ray model cannot be used. To determine the surface normal for each point on the object more accurately, the incoming light direction should be calculated individually for each point. In this work, based on a simple PS setup consisting of LED lamps and one camera, we present a practical method for calibrating lighting directions. First, an optical model of an LED was introduced in the calibration procedure to represent the surface irradiance and image irradiance more accurately. A reference sphere was used for the calibration so that the LED optical axis could be estimated by extracting the specular points from the reference sphere. By introducing the LED emitting model, distance between the LED and the specular point along the optical axis can be calculated. Thus, the incident lighting directions for various image points can be estimated individually. To improve the estimation robustness, a non-linear fitting approach was also applied. Experiments were conducted using objects and the results are compared with traditional methods to demonstrate its feasibility and improvement.

Limin Xie; Zhan Song; Guohua Jiao; Xinhan Huang; Kui Jia

2015-01-01T23:59:59.000Z

367

LED deep UV source for charge management of gravitational reference sensors  

Science Journals Connector (OSTI)

Proof mass electrical charge management is an important functionality for the ST-7-LTP technology demonstration flight and for LISA. Photoemission for charge control is accomplished by using deep ultraviolet (UV) light to excite photoelectron emission from an Au alloy. The conventional UV source is a mercury vapour lamp. We propose and demonstrate charge management using a deep UV light emitting diode (LED) source. We have acquired selected AlGaN UV LEDs, characterized their performance and successfully used them to realize charge management. The UV LEDs emit at a 257 nm central wavelength with a bandwidth of ~12 nm. The UV power for a free-space LED is ~120 µW, and after fibre coupling is ~16 µW, more than sufficient for LISA applications. We have directly observed the LED UV light-induced photocurrent response from an Au photocathode and an Au-coated GRS/ST-7 proof mass. We demonstrated fast switching of UV LEDs and associated fast changes in photocurrent. This allows modulation and continuous discharge to meet stringent LISA disturbance reduction requirements. We propose and demonstrate AC charge management outside the gravitational wave signal band. Further, the megahertz bandwidth for UV LED switching allows for up to six orders of magnitude dynamic power range and a number of novel modes of operations. The UV LED based charge management system offers the advantages of small-size, lightweight, fibre-coupled operation with very low power consumption.

Ke-Xun Sun; Brett Allard; Saps Buchman; Scott Williams; Robert L Byer

2006-01-01T23:59:59.000Z

368

Solid-State Lighting: Adaptive Street Lighting Controls  

NLE Websites -- All DOE Office Websites (Extended Search)

Adaptive Street Lighting Adaptive Street Lighting Controls to someone by E-mail Share Solid-State Lighting: Adaptive Street Lighting Controls on Facebook Tweet about Solid-State Lighting: Adaptive Street Lighting Controls on Twitter Bookmark Solid-State Lighting: Adaptive Street Lighting Controls on Google Bookmark Solid-State Lighting: Adaptive Street Lighting Controls on Delicious Rank Solid-State Lighting: Adaptive Street Lighting Controls on Digg Find More places to share Solid-State Lighting: Adaptive Street Lighting Controls on AddThis.com... Conferences & Meetings Presentations Publications Webcasts Videos Tools Adaptive Street Lighting Controls This two-part DOE Municipal Solid-State Street Lighting Consortium webinar focused on LED street lighting equipped with adaptive control components.

369

Parking Savings Through LED Project for Iowa City | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Parking Savings Through LED Project for Iowa City Parking Savings Through LED Project for Iowa City Parking Savings Through LED Project for Iowa City July 15, 2010 - 1:15pm Addthis Joshua DeLung What does this project do? Iowa City combines State Energy Program grant and rebate from utility. City to save $66,000 annually with energy efficient LED lights in parking garages. Project will reduce energy usage by 1.4 million kWh annually. Iowa City's $1.2 million LED project is expected to save the city about $5,000 each month from changing out old, metal halide light fixtures for LED lights. The cost of the project was partially covered by a $419,000 grant from the U.S. Department of Energy's State Energy Program and a $45,000 rebate from MidAmerican Energy, the local utility company. Brightening the future The LEDs being installed in Iowa City use less energy than normal light

370

A Study of Generalized Second Law of Thermodynamics in Magnetic Universe in the light of Non-Linear Electrodynamics  

E-Print Network (OSTI)

In this work, we have considered the magnetic universe in non-linear electrodynamics. The Einstein's field equations for non-flat FRW model have been considered when the universe is filled with the matter and magnetic field only. We have discussed the validity of the generalized second law of thermodynamics of the magntic universe bounded by Hubble, apparent, particle and event horizons using Gibb's law and the first law of thermodynamics for interacting and non-interacting scenarios. It has been shown that the GSL is always satisfied for Hubble, apparent and particle horizons but for event horizon, the GSL is violated initially and satisfied at late stage of the universe.

Tanwi Bandyopadhyay; Ujjal Debnath

2011-05-20T23:59:59.000Z

371

Inflationary generalized Chaplygin gas and dark energy in the light of the Planck and BICEP2 experiments  

E-Print Network (OSTI)

In this work, we study an inflationary scenario in the presence of Generalized Chaplygin Gas (GCG). We show that in Einstein gravity, GCG is not a suitable candidate for inflation; but in a five dimensional brane world scenario, it can work as a viable inflationary model. We calculate the relevant quantities such as $n_{s}$, $r$ and $A_{s}$ related to the primordial scalar and tensor fluctuations, and using their recent bounds from Planck and BICEP2, we constrain the model parameters as well as the five-dimensional Planck mass. But as a slow-roll inflationary model with a power-law type scalar primordial power spectrum, GCG as an inflationary model can not resolve the tension between results from BICEP2 and Planck with a concordance $\\Lambda$CDM Universe. We show that going beyond the concordance $\\Lambda$CDM model and incorporating more general dark energy behaviour, this tension may be eased. We also obtain the constraints on the $n_{s}$ and $r$ and the GCG model parameters using Planck+WP+BICEP2 data considering the CPL dark energy behaviour.

Bikash R Dinda; Sumit Kumar; Anjan A. Sen

2014-10-21T23:59:59.000Z

372

Professional-led versus family-led support groups: Exploring the differences  

Science Journals Connector (OSTI)

Support groups often help families cope more effectively with relatives' mental illnesses. This study examines the differences between support groups led by professionals and those led by family members, focusing...

Susan A. Pickett Ph.D.; Tamar Heller Ph.D.…

1998-11-01T23:59:59.000Z

373

Revisiting of LED pumped bulk laser: first demonstration of Nd:YVO4 LED pumped laser  

Science Journals Connector (OSTI)

We describe here what is, to the best of our knowledge, the first LED pumped Nd:YVO4 laser. Near-IR LED arrays with a wavelength centered close to 850 nm were used to...

Barbet, Adrien; Balembois, François; Paul, Amandine; Blanchot, Jean-Philippe; Viotti, Anne-Lise; Sabater, Jacques; Druon, Frédéric; Georges, Patrick

2014-01-01T23:59:59.000Z

374

Information Resources: LED Replacements for Linear Fluorescent Lamps  

NLE Websites -- All DOE Office Websites (Extended Search)

Replacements for Linear Fluorescent Lamps Webcast Replacements for Linear Fluorescent Lamps Webcast In this June 20, 2011 webcast on LED products marketed as replacements for linear fluorescent lamps, Jason Tuenge of the Pacific Northwest National Laboratory (PNNL) discussed current Lighting Facts-listed products as well as products evaluated in the latest CALiPER reports. Eric Richman, also of PNNL, reported on a recently completed GATEWAY demonstration project, in which LED and fluorescent lamps were installed in a variety of recessed troffer luminaires for comparison in an office environment. The presentation concluded with a discussion of specifications listed in a newly updated technology fact sheet. View presentation slides View the text-alternative version View the webcast (WMV 16 MB) Download Windows Media Player

375

The solid state lighting initiative: An industry/DOE collaborativeeffort  

SciTech Connect

A new era of technology is emerging in lighting. It is being propelled by the dramatic improvements in performance of solid state light sources. These sources offer an entirely new array of design aspects not achievable with current light sources. At the same time, their performance characteristics continue to improve and are expected to eclipse those of the most common light sources within the near future. High efficiency is one of these performance attributes motivating the Department of Energy (DOE) to work with the manufacturers of this new technology to create a program plan sufficiently comprehensive to support an industry-driven Solid State Lighting Initiative before Congress. The purpose of the initiative is to educate Congress about the potential of this technology to reduce the electric lighting load within the United States and, consequently, to realize the associated environmental benefits. The initiative will solicit congressional support to accelerate the development of solid state technology through investment in the research and development necessary to overcome the technical barriers that currently limit the products to niche markets. While there are multiple technologies being developed as solid state light sources, the two technologies which hold the most promise for application to general illumination are Light Emitting Diodes (LEDs) and Organic Light Emitting Diodes (OLEDs). The form of these sources can be quite different from current sources, allowing exciting new design uses for the products. Being diffuse sources, OLEDs are much lower in intensity per unit area than LEDs. The manufacturing process for OLEDs lends itself to shapes that can be formed to different geometries, making possible luminous panels or flexible luminous materials. Conversely, LEDs are very intense point sources which can be integrated into a small space to create an intense source or used separately for less focused applications. Both OLED and LED sources are expected to be thinner than other comparable sources; this thinness offers additional design opportunities.

Johnson, Steve

2000-10-01T23:59:59.000Z

376

Fort Meade demonstration test LEDS in freezer rooms, fiber optics in display cases  

SciTech Connect

Demonstration projects at Fort George G. Meade, MD, substituted LED lighting for incandescent bulbs in commisary wal-in freezers and fiber optic lighting in reach-in display cases. The goal was to reduce energy consumption and the results were positive. Journal article published in Public Works Digest

Parker, Steven; Parker, Graham B.

2008-10-25T23:59:59.000Z

377

Emerging Lighting Technology  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Emerging Lighting Technology Emerging Lighting Technology Bruce Kinzey Pacific Northwest National Laboratory FUPWG - Portland, OR April 20, 2011 www.ssl.energy.gov 2 | Solid-State Lighting Program GATEWAY Demonstration Program * Purpose: demonstrate new SSL products in real-world applications that save energy, match or improve illumination, and are cost- effective * Demos generate critical field experience providing: - Feedback to manufacturers - Data for utility incentives - Market readiness of specific applications to users - Advancement in lighting knowledge Central Park, NY Photo: Ryan Pyle Smithsonian American Art Museum, Washington, D.C. Photo: Scott Rosenfeld www.ssl.energy.gov 3 | Solid-State Lighting Program LED Product Explosion www.ssl.energy.gov 4 | Solid-State Lighting Program LEDs are Not a Universal Lighting

378

Shaping the Next - Buildings and Energy: Advanced Lighting  

SciTech Connect

short bit on advanced lighting for the future relating specifically to controls and new tech such as LEDs

Richman, Eric E.

2014-01-01T23:59:59.000Z

379

The High Light Response in Arabidopsis Involves ABA Signaling between Vascular and Bundle Sheath Cells  

Science Journals Connector (OSTI)

...CCD camera (Wright Instruments) with a custom-built LED lighting system (Technologica) that provides a constant and homogenous...also supported by grants from National Institute of General Medical Sciences (R01GM065989), the Department of Energy (DE-FG02-05er15671...

Gregorio Galvez-Valdivieso; Michael J. Fryer; Tracy Lawson; Katie Slattery; William Truman; Nicholas Smirnoff; Tadao Asami; William J. Davies; Alan M. Jones; Neil R. Baker; Philip M. Mullineaux

2009-07-28T23:59:59.000Z

380

Wavelength-stable rare earth-free green light-emitting diodes for energy efficiency  

Science Journals Connector (OSTI)

Solid state lighting seeks to replace both, incandescent and fluorescent lighting by energy efficient light-emitting diodes (LEDs). Just like compact fluorescent tubes, current white...

Wetzel, Christian; Detchprohm, Theeradetch

2011-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "led general lighting" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


381

Engineering design and assessment of a demand-sensitive LED streetlighting system  

Science Journals Connector (OSTI)

Abstract A solid-state lighting technology was demonstrated at a US Navy Research Center in Maryland – where light-emitting diode (LED) luminaires were substituted for existing high pressure sodium (HPS) streetlighting units, and an intelligent lighting control system was deployed. This paper summarizes the prudent engineering design and implementation of the demand-sensitive feature of the LED streetlighting system at Naval Surface Warfare Center (NSWC) Carderock Division that provides an annual average electricity and CO2 savings of 74%. In addition, technical system performance and life-cycle assessment of the HPS and the new LED systems are discussed. Best practices and field experience that can help with other similar smart lighting implementation elsewhere are also summarized.

Manisa Pipattanasomporn; Saifur Rahman; Isaac Flory; Yonael Teklu

2014-01-01T23:59:59.000Z

382

Marine Corps Base Quantico Achieves 85% Savings in Parking Lighting...  

Office of Environmental Management (EM)

by conducting a major overhaul of its outdoor lighting (replacing 2,000 fixtures with LED lights), while boosting safety and security throughout the site. mcbquantico2014.pdf...

383

SemiLEDs | Open Energy Information  

Open Energy Info (EERE)

SemiLEDs SemiLEDs Jump to: navigation, search Name SemiLEDs Place Boise, Idaho Zip 83702 Product US-based LED chip maker with Asia manufacturing operations. Coordinates 43.60698°, -116.193409° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":43.60698,"lon":-116.193409,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

384

LEDS Events Calendar | Open Energy Information  

Open Energy Info (EERE)

source source History View New Pages Recent Changes All Special Pages Semantic Search/Querying Get Involved Help Apps Datasets Community Login | Sign Up Search Page Edit History Facebook icon Twitter icon » LEDS Events Calendar Jump to: navigation, search Home | About | Inventory | Partnerships | Capacity Building | Webinars | Reports | Events | News | List Serve LEDS Events Calendar January 2014 Today January February March April May June July August September October November December 2014 Go to month Sunday Monday Tuesday Wednesday Thursday Friday Saturday 29 30 31 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 1 Add an Event Upcoming LEDS Events Retrieved from "http://en.openei.org/w/index.php?title=LEDS_Events_Calendar&oldid=384765" What links here Related changes

385

DOE Hosts LED Industry Standards Workshop  

Energy.gov (U.S. Department of Energy (DOE))

The U.S. Department of Energy hosted an LED Industry Standards Workshop on March 1, 2006 in Washington, D.C. The Workshop provided a forum to encourage greater cooperation and coordination among...

386

Final decisions that led to Y-12  

NLE Websites -- All DOE Office Websites (Extended Search)

decisions that led to Y-12 As we have seen earlier in this series, Ernest O. Lawrence and his University of California Radiation Lab in Berkeley was the center for research using...

387

Sandia National Laboratories: warm white LED  

NLE Websites -- All DOE Office Websites (Extended Search)

warm white LED Sandia Develops a Synthesis of Quantum Dots that Increases the Quantum Yield to 95.5% On May 23, 2013, in Energy, Energy Efficiency, Materials Science, News, News &...

388

High Efficiency m-plane LEDs on Low Defect Density Bulk GaN Substrates  

SciTech Connect

Solid-state lighting is a key technology for reduction of energy consumption in the US and worldwide. In principle, by replacing standard incandescent bulbs and other light sources with sources based on light-emitting diodes (LEDs), ultimate energy efficiency can be achieved. The efficiency of LEDs has improved tremendously over the past two decades, however further progress is required for solid- state lighting to reach its full potential. The ability of an LED at converting electricity to light is quantified by its internal quantum efficiency (IQE). The material of choice for visible LEDs is Gallium Nitride (GaN), which is at the basis of blue-emitting LEDs. A key factor limiting the performance of GaN LEDs is the so-called efficiency droop, whereby the IQE of the LED decreases significantly at high current density. Despite decades of research, efficiency droop remains a major issue. Since high-current operation is necessary for practical lighting applications, reducing droop is a major challenge for the scientific community and the LED industry. Our approach to solving the droop issue is the use of newly available low-defect-density bulk GaN non-polar substrates. In contrast to the standard foreign substrates (sapphire, silicon carbide, silicon) used in the industry, we have employed native bulk GaN substrates with very low defect density, thus ensuring exquisite material quality and high IQE. Whereas all commercial LEDs are grown along the c-plane crystal direction of GaN, we have used m-plane non-polar substrates; these drastically modify the physical properties of the LED and enable a reduction of droop. With this approach, we have demonstrated very high IQE performance and low droop. Our results focused on violet and blue LEDs. For these, we have demonstrated very high peak IQEs and current droops of 6% and 10% respectively (up to a high current density of 200A.cm-2). All these results were obtained under electrical operation. These high IQE and low droop values are in line with the program’s milestones. They demonstrate that bulk non-polar GaN substrates represent a disruptive technology for LED performance. Application of this technology to real-world products is feasible, provided that the cost of GaN substrates is compatible with the market’s requirement.

David, Aurelien

2012-10-15T23:59:59.000Z

389

LED lamp or bulb with remote phosphor and diffuser configuration with enhanced scattering properties  

DOE Patents (OSTI)

An LED lamp or bulb is disclosed that comprises a light source, a heat sink structure and an optical cavity. The optical cavity comprises a phosphor carrier having a conversions material and arranged over an opening to the cavity. The phosphor carrier comprises a thermally conductive transparent material and is thermally coupled to the heat sink structure. An LED based light source is mounted in the optical cavity remote to the phosphor carrier with light from the light source passing through the phosphor carrier. A diffuser dome is included that is mounted over the optical cavity, with light from the optical cavity passing through the diffuser dome. The properties of the diffuser, such as geometry, scattering properties of the scattering layer, surface roughness or smoothness, and spatial distribution of the scattering layer properties may be used to control various lamp properties such as color uniformity and light intensity distribution as a function of viewing angle.

Tong, Tao; Le Toquin, Ronan; Keller, Bernd; Tarsa, Eric; Youmans, Mark; Lowes, Theodore; Medendorp, Jr., Nicholas W; Van De Ven, Antony; Negley, Gerald

2014-11-11T23:59:59.000Z

390

Reading Municipal Light Department - Business Lighting Rebate Program |  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Reading Municipal Light Department - Business Lighting Rebate Reading Municipal Light Department - Business Lighting Rebate Program Reading Municipal Light Department - Business Lighting Rebate Program < Back Eligibility Agricultural Commercial Fed. Government Industrial Institutional Local Government Nonprofit Schools State Government Savings Category Appliances & Electronics Commercial Lighting Lighting Maximum Rebate Commercial Customers: $10,000 per calendar year Municipal Customers: $15,000 per calendar year Program Info State Massachusetts Program Type Utility Rebate Program Rebate Amount T-8/T-5 Lamp with Electronic Ballasts: $11 - $35/fixture Interior High Output Lamp with Electronic Ballasts: $100/fixture De-lamping: $4 - $9/lamp Lighting Sensors: $20/sensor LED Exit Signs: $20/fixture Provider Incentive Programs

391

White light emitting diode as liquid crystal display backlight ; High brightness light emitting diode as liquid crystal display backlight .  

E-Print Network (OSTI)

??The discovery of high brightness (white) light emitting diode (LED) is considered as a real threat to the current lighting industry in various applications. One… (more)

Soon, Chian Myau

2007-01-01T23:59:59.000Z

392

I Have Seen the Light and It's Green...or Pink, or Blue, or Purple...  

Office of Environmental Management (EM)

or Blue, or Purple. Shucks, it's LED Solid-State Lighting. I Have Seen the Light and It's Green...or Pink, or Blue, or Purple. Shucks, it's LED Solid-State Lighting. May 5, 2009 -...

393

An unsuccessful attempt to elicit orientation responses to linearly polarized light in hatchling loggerhead sea turtles (Caretta caretta)  

Science Journals Connector (OSTI)

...a steady course towards a light-emitting diode (LED) light source while...tethered in the tank with a light-emitting diode (LED) light source placed...a steady course towards a light-emitting diode (LED) light source while...

2011-01-01T23:59:59.000Z

394

The evolving price of household LED lamps: Recent trends and historical comparisons for the US market  

SciTech Connect

In recent years, household LED light bulbs (LED A lamps) have undergone a dramatic price decline. Since late 2011, we have been collecting data, on a weekly basis, for retail offerings of LED A lamps on the Internet. The resulting data set allows us to track the recent price decline in detail. LED A lamp prices declined roughly exponentially with time in 2011-2014, with decline rates of 28percent to 44percent per year depending on lumen output, and with higher-lumen lamps exhibiting more rapid price declines. By combining the Internet price data with publicly available lamp shipments indices for the US market, it is also possible to correlate LED A lamp prices against cumulative production, yielding an experience curve for LED A lamps. In 2012-2013, LED A lamp prices declined by 20-25percent for each doubling in cumulative shipments. Similar analysis of historical data for other lighting technologies reveals that LED prices have fallen significantly more rapidly with cumulative production than did their technological predecessors, which exhibited a historical decline of 14-15percent per doubling of production.

Gerke, Brian F.; Ngo, Allison T.; Alstone, Andrea L.; Fisseha, Kibret S.

2014-10-14T23:59:59.000Z

395

Solid-State Lighting: Why SSL  

NLE Websites -- All DOE Office Websites (Extended Search)

Why SSL to someone by E-mail Why SSL to someone by E-mail Share Solid-State Lighting: Why SSL on Facebook Tweet about Solid-State Lighting: Why SSL on Twitter Bookmark Solid-State Lighting: Why SSL on Google Bookmark Solid-State Lighting: Why SSL on Delicious Rank Solid-State Lighting: Why SSL on Digg Find More places to share Solid-State Lighting: Why SSL on AddThis.com... Why SSL LED Basics OLED Basics Using LEDs R&D Challenges Market Challenges Why SSL Resources Solid-State Lighting: Brilliant Solutions for America's Energy Future PDF Energy Savings Potential of SSL PDF Energy Savings Estimates of LEDs PDF More Resources Since 2003, the U.S. Department of Energy has invested with industry partners in research and development of solid-state lighting (SSL)-including both light-emitting diode (LED) and organic light

396

A fluctuational electrodynamics model for the optimization of light-extraction efficiency in thin-film light-emitting diodes  

SciTech Connect

The rapid development of thin film light-emitting diodes (LEDs) has enabled the enhancement of the light extraction beyond geometrical limits but more quantitative understanding of the underlying optical processes is required to fully optimize the extraction. We present first-principle calculations of the light extraction efficiency and optical energy flow in thin-film LEDs. The presented model generalizes the methods of fluctuational electrodynamics to excited semiconductors and simultaneously accounts for wave optical effects, e.g., interference and near-field coupling as well as the internal absorption of the light-emitting material in determining the rate of light emission and internal dissipation in the optical cavity formed by a planar LED. The calculations show that in structures with a metallic mirror, the emissivity of the active region can approach unity at selected wavelengths, even when the nominal emissivity of the active region is only moderate. However, the results also show that near-field coupling of emission from the active region to the mirror can provide a substantial non-radiative loss channel reducing the maximum light extraction efficiency to 0.67 in our example setup. These losses can be partly compensated by the efficient photon recycling enabled by thick active regions that quench emission to confined modes and thereby reduce parasitic absorption.

Heikkilä, Oskari, E-mail: oskari.heikkila@aalto.fi; Oksanen, Jani; Tulkki, Jukka [Department of Biomedical Engineering and Computational Science, Aalto University, Helsinki (Finland)

2013-12-14T23:59:59.000Z

397

LED Emission through Sub-Wavelength Apertures  

Science Journals Connector (OSTI)

A gold film with a hexagonal array of sub-wavelength apertures has been fabricated onto the emitting surface of a semiconductor light emitting diode. Interaction of the light with...

Harries, Michael D; Summers, Huw D

398

Poudre Valley REA - Commercial Lighting Rebate Program (Colorado) |  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Commercial Lighting Rebate Program (Colorado) Commercial Lighting Rebate Program (Colorado) Poudre Valley REA - Commercial Lighting Rebate Program (Colorado) < Back Eligibility Commercial Savings Category Appliances & Electronics Commercial Lighting Lighting Maximum Rebate Commercial Lighting Retrofit: 50% of equipment cost, $20,000 LED Street Lighting/Induction Street Lighting: $20,000 Program Info State Colorado Program Type Utility Rebate Program Rebate Amount LED Refrigerated Case Lighting (Top Lighting): $60 per ln ft LED Refrigerated Case Lighting (Case Lighting): $60 per door LED Street Lighting: $44 - $475 per fixture Induction Street Lighting: $33 - $355 per fixture Commercial Lighting Retrofit: $250 per kW saved Provider Poudre Valley REA Poudre Valley Rural Electric Association (PVREA), a Touchstone Energy

399

FAQ of Overview of Solid-State Lighting  

NLE Websites -- All DOE Office Websites (Extended Search)

FREQUENTLY ASKED QUESTIONS 3 Leds FREQUENTLY ASKED QUESTIONS 3 Leds 1. What is solid-state lighting? 2. What is a semiconductor? 3. What is a semiconductor LED (light emitting diode)? 4. What is an organic LED (OLED)? 5. Where can I see LED lighting today? 6. How do you produce white light using LEDs? 7. How does solid-state lighting differ from conventional lighting? 8. What is the energy efficiency of solid-state lighting today? How does the energy efficiency compare with incandescent and fluorescent lamps? 9. What is the cost of solid-state lighting today? How does the cost compare with incandescent and fluorescent lamps? 10. What is the quality of the white light using solid-state lighting today? How does it compare with incandescent and fluorescent lamps?

400

Monolayer graphene dispersion and radiative cooling for high power LED  

Science Journals Connector (OSTI)

Molecular fan, a radiative cooling by thin film, has been developed and its application for compact electronic devices has been evaluated. The enhanced surface emissivity and heat dissipation efficiency of the molecular fan coating are shown to correlate with the quantization of lattice modes in active nanomaterials. The highly quantized G and 2D bands in graphene are achieved by our dispersion technique, and then incorporated in an organic-inorganic acrylate emulsion to form a coating assembly on heat sinks (for LED and CPU). This water-based dielectric layer coating has been formulated and applied on metal core printed circuit boards. The heat dissipation efficiency and breakdown voltage are evaluated by a temperature-monitoring system and a high-voltage breakdown tester. The molecular fan coating on heat dissipation units is able to decrease the equilibrium junction temperature by 29.1?° C, while functioning as a dielectric layer with a high breakdown voltage (>5 kV). The heat dissipation performance of the molecular fan coating applied on LED devices shows that the coated 50 W LED gives an enhanced cooling of 20% at constant light brightness. The schematics of monolayer graphene dispersion, undispersed graphene platelet, and continuous graphene sheet are illustrated and discussed to explain the mechanisms of radiative cooling, radiative/non-radiative, and non-radiative heat re-accumulation.

Tun-Jen Hsiao; Tsehaye Eyassu; Kimberly Henderson; Taesam Kim; Chhiu-Tsu Lin

2013-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "led general lighting" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


401

Consumer Light Bulb Changes: Briefing and Resources for Media and Retailers  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Briefing for Media and Retailers - Lighting eere.energy.gov Briefing for Media and Retailers - Lighting eere.energy.gov 1 Consumer Light Bulb Changes: Briefing and Resources for Media and Retailers Briefing for Media and Retailers - Lighting eere.energy.gov 2 * Briefing: - To schedule interviews, please contact DOE Public Affairs at 202-586-4940 * Terms: - Lumens: Commonly a measure of brightness (technically "luminous flux") - CFL: Compact Fluorescent Lamp: The curly fluorescent bulbs - LED: Light Emitting Diode: more recently emerging technology, also called "solid state lighting" as it is light produced by a solid-state (chip) device - General Service Incandescent Lamp: The most common residential light bulb in use, with a medium screw base, and a lumen range of 310 to 2,600 lumens

402

130 LPW 1000 Lm Warm White LED for Illumination  

SciTech Connect

An illumination-grade warm-white LED, having correlated color temperature (CCT) between 2700 and 3500 K and capable of producing 1000 lm output at over 130 lm/W at room temperature, has been developed in this program. The high-power warm-white LED is an ideal source for use in indoor and outdoor lighting applications. Over the two year period, we have made the following accomplishments: • Developed a low-cost high-power white LED package and commercialized a series of products with CCT ranging from 2700 to 5700 K under the product name LUXEON M; • Demonstrated a record efficacy of 124.8 lm/W at a flux of 1023 lm, CCT of 3435 K and color rendering index (CRI) over 80 at room temperature in the productized package; • Demonstrated a record efficacy of 133.1 lm/W at a flux of 1015 lm, CCT of 3475 K and CRI over 80 at room temperature in an R&D package. The new high-power LED package is a die-on-ceramic surface mountable LED package. It has four 2 mm2 InGaN pump dice, flip-chip attached to a ceramic submount in a 2x2 array configuration. The submount design utilizes a design approach that combines a high-thermal- conductivity ceramic core for die attach and a low-cost and low-thermal-conductivity ceramic frame for mechanical support and as optical lens carrier. The LED package has a thermal resistance of less than 1.25 K/W. The white LED fabrication also adopts a new batch level (instead of die-by-die) phosphor deposition process with precision layer thickness and composition control, which provides not only tight color control, but also low cost. The efficacy performance goal was achieved through the progress in following key areas: (1) high-efficiency royal blue pump LED development through active region design and epitaxial growth quality improvement (funded by internal programs); (2) improvement in extraction efficiency from the LED package through improvement of InGaN-die-level and package-level optical extraction efficiency; and (3) improvement in phosphor system efficiency by improving the lumen equivalent (LE) and phosphor package efficiency (PPE) through improvement in phosphor-package interactions. The high-power warm-white LED product developed has been proven to have good reliability through extensive reliability tests. The new kilo-lumen package has been commercialized under the product name LUXEON M. As of the end of the program, the LUXEON M product has been released in the following CCT/CRI combinations: 3000K/70, 4000K/70, 5000K/70, 5700K/70, 2700K/80, 3000K/80 and 4000K/80. LM-80 tests for the products with CCTs of 4000 K and higher have reached 8500 hours, and per IESNA TM-21-11 have established an L70 lumen maintenance value of >51,000 hours at A drive current and up to 120 °C board temperature.

Soer, Wouter

2012-06-14T23:59:59.000Z

403

LEDS GP Second Annual Event: Learning and Leading on LEDS Workshop | Open  

Open Energy Info (EERE)

GP Second Annual Event: Learning and Leading on LEDS Workshop GP Second Annual Event: Learning and Leading on LEDS Workshop Jump to: navigation, search LEDSGP Logo.png Advancing climate-resilient low emission development around the world Home About Tools Expert Assistance Events Publications Join Us Calendar.png LEDS GP Second Annual Event: Learning and Leading on LEDS Workshop: on 2013/02/27 (February 27 - March 1, 2013) The LEDS Global Partnership is convening its second annual global workshop to bring together leading practitioners from countries and international institutions to share lessons and strengthen cooperation on low emission development around the world. The workshop will convene peer learning and collaboration sessions on common topics of interest defined by the African Climate & Development Society, Asia LEDS

404

LEDS Tier I Activities | Open Energy Information  

Open Energy Info (EERE)

Tier I Activities Tier I Activities Jump to: navigation, search Name LEDS Tier I Activities Agency/Company /Organization United States Department of State, United States Department of Agriculture Partner Multiple Ministries of Agriculture Sector Climate, Land Focus Area Agriculture, Land Use Topics Co-benefits assessment, Low emission development planning, -LEDS Website http://transition.usaid.gov/ou Program Start 2011 Program End 2014 Country Costa Rica, Kenya Central America, Eastern Africa References Enhancing Capacity for Low Emission Development Strategies Program[1] Overview "Enhancing Capacity for Low Emission Development Strategies (EC-LEDS) is a U.S. Government initiative to support developing countries' efforts to pursue long-term, transformative development and accelerate sustainable,

405

SMART LIGHTING SYSTEMS ULTIMATE LIGHTING The Smart Lighting  

E-Print Network (OSTI)

Integration (Holistic Integrated Design) · Sensors as important as LEDs · Interconnected systems (human, building, grid) · Artistic Design Freedom · Lighting is Health, Entertainment, Information and Illumination Cost at any brightness · Chip level integrated electronics THE ERC RESEARCH COVERS THE ENTIRE SUPPLY

Linhardt, Robert J.

406

THELUMINAPROJECT http://light.lbl.gov  

E-Print Network (OSTI)

source of portable lighting in Kenya, outpacing incandescent flashlights (Johnstone et al., 2009). LED technology has the potential to provide efficiency and performance benefits relative to incandescent bulbs

Jacobson, Arne

407

LED exit signs: Improved technology leads the way to energy savings  

SciTech Connect

Recent innovations in light-emitting diode (LED) exit signs may make LED signs the best choice among the energy efficient options available. In the past, LED signs have offered low power consumption, projected long lamp life, and low maintenance requirements. Now, the best of the LED signs also offer improved optical designs that reduce their already low power consumption while improving visibility and appearance, and even reduce their cost. LED exit signs are gaining market share, and E Source expects this technology to eventually dominate over incandescent, compact fluorescent, and electroluminescent signs. More research is needed, however, to confirm manufacturers` claims of 20-year operating lives for LED signs. Conservative estimates place the number of exit signs in US buildings at about 40 million. Although each sign represents a very small part of a building`s load, exit signs are ready targets for energy efficiency upgrades -- they operate continuously and most use inefficient incandescent sources. With an LED sign, annual energy and maintenance costs can be reduced by more than 90 percent compared to a typical incandescent sign. Low annual costs help to offset the LED sign`s relatively high first cost. More than 25 utilities offer DSM incentives for energy efficient exit signs, and efficient alternatives are becoming more readily available. Recent improvements in optical designs enable many LED signs to visually out perform other sources. In addition to these benefits, LED exit signs have lower life cycle cost than most other options. The biggest barrier to their success, however, is that their first cost has been considerably higher than competing technologies. LED sign prices are falling rapidly, though, because manufacturers are continually improving optical designs of the fixtures to use fewer LEDs and thus even less energy while providing better performance.

Sardinsky, R.; Hawthorne, S.

1994-12-31T23:59:59.000Z

408

Solid State Lighting ECE 198 Lab Manual  

E-Print Network (OSTI)

commonly available light bulbs: halogen, incandescent, compact fluorescent, and light-emitting diode (LED will look at the spectrum of the light emitted from the each light bulb, using the spectrometers you). Over the course of the lab, you will perform variety of tests on each of the light bulbs in order

Wasserman, Daniel M.

409

Assessment of LED Technology in Ornamental Post-Top Luminaires (Host Site: Sacramento, CA)  

SciTech Connect

The DOE Municipal Solid-State Street Lighting Consortium has evaluated four different LED replacements for existing ornamental post-top street lights in Sacramento, California. The project team was composed of the City and its consultant, PNNL (representing the Consortium), and the Sacramento Municipal Utility District. Product selection was finalized in March 2011, yielding one complete luminaire replacement and three lamp-ballast retrofit kits. Computer simulations, field measurements, and laboratory testing were performed to compare the performance and cost-effectiveness of the LED products relative to the existing luminaire with 100 W high-pressure sodium lamp. After it was confirmed the LED products were not equivalent to HPS in terms of initial photopic illumination, the following parameters were scaled proportionally to enable equitable (albeit hypothetical) comparisons: light output, input wattage, and pricing. Four replacement scenarios were considered for each LED product, incorporating new IES guidance for mesopic multipliers and lumen maintenance extrapolation, but life cycle analysis indicated cost effectiveness was also unacceptable. Although LED efficacy and pricing continue to improve, this project serves as a timely and objective notice that LED technology may not be quite ready yet for such applications.

Tuenge, Jason R.

2011-12-01T23:59:59.000Z

410

LED Illumination with a Condensing Sphere  

Science Journals Connector (OSTI)

Novel compact and efficient illumination systems are described which comprise dielectric spheres with planar cuts at the edges and imbedded light emitting diodes. The rays are...

Chi, Wanli; George, Nicholas

411

The European Commission's light bulb decree: Another costly regulation?  

Science Journals Connector (OSTI)

Since September 2009, Regulation 244/2009 of the European Commission enforces the gradual phase-out of incandescent light bulbs. As of September 2012, only energy-efficient lighting sources will be allowed for sale. Among these are halogen light bulbs, light-emitting diodes (LED), or compact fluorescent light bulbs—often referred to as energy-saving light bulbs. The Commission's justification for the phase-out of conventional light bulbs maintains that a reduction in the electricity consumed will not only lead to lower energy cost for private households and industrial consumers, but at the same time lead to a decrease in greenhouse gas emissions. This article discusses possible reasons for the slow market diffusion of energy-saving light bulbs and shows that the investment in energy-efficient light bulbs does not necessarily lead to significant cost reductions. Drawing on some illustrative examples, we demonstrate that the use of cheaper incandescent bulbs instead of energy-saving light bulbs can be economically rational in cases of rather low usage times, in which the higher initial purchasing price might only pay off after very long time spans. Furthermore, due to the coexistence with the European Emissions Trading Scheme (ETS), this regulation attains no additional emission reductions beyond those achieved by the ETS alone. We thus conclude that the general ban of incandescent light bulbs is inappropriate and should be abolished by the Commission.

Manuel Frondel; Steffen Lohmann

2011-01-01T23:59:59.000Z

412

Long-term Testing Results for the 2008 Installation of LED Luminaires at the I-35 West Bridge in Minneapolis  

SciTech Connect

This document reports the long-term testing results from an extended GATEWAY project that was first reported in “Demonstration Assessment of Light-Emitting Diode (LED) Roadway Lighting at the I-35W Bridge, in Minneapolis, MN,” August 2009. That original report presented the results of lighting the newly reconstructed I 35W Bridge using LEDs in place of conventional high-pressure sodium (HPS) roadway luminaires, comparing energy use and illuminance levels with a simulated baseline condition. That installation was an early stage implementation of LED lighting and remains one of the oldest installations in continued operation today. This document provides an update of the LED system’s performance since its installation in September 2008.

Kinzey, Bruce R.; Davis, Robert G.

2014-09-30T23:59:59.000Z

413

Lighting Basics | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Lighting Basics Lighting Basics Lighting Basics August 15, 2013 - 5:12pm Addthis Text Version There are many different types of artificial lights, all of which have different applications and uses. Types of lighting include: Fluorescent Lighting High-intensity Discharge Lighting Incandescent Lighting LED Lighting Low-pressure Sodium Lighting. Which type is best depends on the application. See the chart below for a comparison of lighting types. Lighting Comparison Chart Lighting Type Efficacy (lumens/watt) Lifetime (hours) Color Rendition Index (CRI) Color Temperature (K) Indoors/Outdoors Fluorescent Straight Tube 30-110 7000-24,000 50-90 (fair to good) 2700-6500 (warm to cold) Indoors/outdoors Compact Fluorescent 50-70 10,000 65-88 (good) 2700-6500 (warm to cold) Indoors/outdoors

414

GaN-based micro-LED arrays on flexible substrates for optical cochlear implants  

Science Journals Connector (OSTI)

Currently available cochlear implants are based on electrical stimulation of the spiral ganglion neurons. Optical stimulation with arrays of micro-sized light-emitting diodes (µLEDs) promises to increase the number of distinguishable frequencies. Here, the development of a flexible GaN-based micro-LED array as an optical cochlear implant is reported for application in a mouse model. The fabrication of 15 µm thin and highly flexible devices is enabled by a laser-based layer transfer process of the GaN-LEDs from sapphire to a polyimide-on-silicon carrier wafer. The fabricated 50 ? 50 µm2 LEDs are contacted via conducting paths on both p- and n-sides of the LEDs. Up to three separate channels could be addressed. The probes, composed of a linear array of the said µLEDs bonded to the flexible polyimide substrate, are peeled off the carrier wafer and attached to flexible printed circuit boards. Probes with four µLEDs and a width of 230 µm are successfully implanted in the mouse cochlea both in vitro and in vivo. The LEDs emit 60 µW at 1 mA after peel-off, corresponding to a radiant emittance of 6 mW mm?2.

Christian Goßler; Colin Bierbrauer; Rüdiger Moser; Michael Kunzer; Katarzyna Holc; Wilfried Pletschen; Klaus Köhler; Joachim Wagner; Michael Schwaerzle; Patrick Ruther; Oliver Paul; Jakob Neef; Daniel Keppeler; Gerhard Hoch; Tobias Moser; Ulrich T Schwarz

2014-01-01T23:59:59.000Z

415

Light-Emitting Diodes in the Solid-State Lighting Systems  

E-Print Network (OSTI)

Red and green light-emitting diodes (LEDs) had been produced for several decades before blue emitting diodes, suitable for lighting applications, were widely available. Today, we have the possibility of combining the three fundamental colours to have a bright white light. And therefore, a new form of lighting, the solid-state lighting, has now become a reality. Here we discuss LEDs and some of their applications in displays and lamps.

Sparavigna, Amelia Carolina

2014-01-01T23:59:59.000Z

416

EECBG Success Story: Lighting Retrofit Improving Visibility,...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

Retrofit Improving Visibility, Saving Energy August 27, 2010 - 10:05am Addthis New LED lighting fixtures (right) emit a whiter light than existing high-pressure sodium cobra...

417

Sandia National Laboratories: Solid-State Lighting  

NLE Websites -- All DOE Office Websites (Extended Search)

(LEDs), has the potential to be 10 times more energy efficient than traditional incandescent light bulbs. Currently, 20% of U.S. energy use powers lighting. SSL technology can...

418

Smart Lighting: A Second Wave in Solid State Lighting?  

E-Print Network (OSTI)

is Smart Lighting? · A Second Wave? #12;Bulbs transition to..... Bulbs! 3 · Sockets exist, so why not use them? (faster revenue, energy savings) · LED sources are mostly lower brightness · LED idiosyncrasies make broad incandescent and fluorescent replacement difficult ­ new fixtures coming First Wave #12

Salama, Khaled

419

Category:LEDS Toolkit | Open Energy Information  

Open Energy Info (EERE)

Toolkit Toolkit Jump to: navigation, search This page contains toolkits meant to support the creation and implementation of a Low Emission Development Strategy. Pages in category "LEDS Toolkit" The following 14 pages are in this category, out of 14 total. A Agriculture Work Space/Tools B Bioenergy Assessment Toolkit Bioenergy Toolkit E Energy System and Scenario Analysis Toolkit F Financing Initiatives Toolkit G Greenhouse Gas Inventory Development Toolkit I Impact Assessment Toolkit L Land Use Assessment Toolkit Land-use Policy and Program Design Toolkit Land-use Scenario Analysis Toolkit M Market Analysis Toolkit P Policy and Program Design Toolkit S Sustainable Land-use Impact Assessment Toolkit T Transportation Assessment Toolkit Retrieved from "http://en.openei.org/w/index.php?title=Category:LEDS_Toolkit&oldid=332209

420

White LED with High Package Extraction Efficiency  

Office of Scientific and Technical Information (OSTI)

WHITE LED WITH HIGH PACKAGE WHITE LED WITH HIGH PACKAGE EXTRACTION EFFICIENCY Final Report Report Period Start Date: 10/01/2006 Report Period End Date: 09/30/2008 Authors: Yi Zheng and Matthew Stough Report Submission Date: November 2008 DOE Award Number: DE-FC26-06NT42935 Project Manager: Ryan Egidi OSRAM SYLVANIA Product Inc Central Research and Service Laboratory 71 Cherry Hill Dr., Beverly, MA 01915 2 DISCLAIMER This report was prepared as an account of work sponsored by an agency of the United States Government. Neither the United States Government nor an agency thereof, nor any of their employees, makes any warranty, express or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus,

Note: This page contains sample records for the topic "led general lighting" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


421

To Bridge LEDs' Green Gap, Scientists Think Small  

NLE Websites -- All DOE Office Websites (Extended Search)

To Bridge LEDs' Green Gap, Scientists Think Small To Bridge LEDs' Green Gap, Scientists Think Small Nanostructures Half a DNA Strand-Wide Show Promise for Efficient LEDs April 4,...

422

Strong Coupling in a Microcavity LED  

Science Journals Connector (OSTI)

Thin films of polyelectrolyte/J aggregate dye bilayers with high absorption coefficient (6 nm thick with ??1.0×106??cm-1) inserted in an optical microcavity enable the cavity quantum electrodynamic strong coupling limit to be reached at room temperature with a coupling strength (Rabi splitting) of 265±15??meV. By embedding these films in a resonant cavity organic LED structure, we demonstrate the first emissive electrically pumped exciton-polariton device.

Jonathan R. Tischler; M. Scott Bradley; Vladimir Bulovi?; Jung Hoon Song; Arto Nurmikko

2005-07-15T23:59:59.000Z

423

FEMP Outdoor Solid State Lighting Intiative: Resources for Outdoor SSL Applications  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Municipal Solid-State Street Lighting Municipal Solid-State Street Lighting Consortium Fact Sheet - The Consortium shares technical information and experi- ences related to LED street and area light- ing demonstrations. The Consortium also serves as an objective resource for evalu- ating new products on the market intended for street and area lighting applications. http://apps1.eere.energy.gov/buildings/ publications/pdfs/ssl/consortium_fs.pdf DOE SSL GATEWAY Demonstration Project Results - DOE GATEWAY dem- onstrations showcase high-performance LED products for general illumination in a variety of commercial and residential applications. Demonstration results pro- vide real-world experience and data on state-of-the-art SSL product performance and cost effectiveness. DOE CALiPER Test Results - The DOE

424

Research Led by Sandia Reveals Leading-Edge Erosion Significantly...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Research Led by Sandia Reveals Leading-Edge Erosion Significantly Reduces Wind Turbine Performance Research Led by Sandia Reveals Leading-Edge Erosion Significantly Reduces Wind...

425

To Bridge LEDs' Green Gap, Scientists Think Small  

NLE Websites -- All DOE Office Websites (Extended Search)

emitting diodes (LEDs), especially in the "green gap," a portion of the spectrum where LED efficiency plunges, simulations at the U.S. Department of Energy's National Energy...

426

Energy Department Announces New Investments in University-Led...  

Energy Savers (EERE)

Investments in University-Led Nuclear Energy Innovation Energy Department Announces New Investments in University-Led Nuclear Energy Innovation September 27, 2012 - 11:07am Addthis...

427

Taking a Bite out of Lighting Loads  

E-Print Network (OSTI)

Take a Bite Out of Lighting Loads With LEDs Stephen Williams Toshiba Sales Support Manager ESL-KT-13-12-34 CATEE 2013: Clean Air Through Energy Efficiency Conference, San Antonio, Texas Dec. 16-18 Some LED Advantages • Less electricity ? 18w LED... = 100w PAR38 • No maintenance for years ? 50,000 LED vs.10,000 CFL • Improved light quality ? 80 CRI LED vs. 25 CRI HPS • Reduce HVAC cooling load • Advanced control options ESL-KT-13-12-34 CATEE 2013: Clean Air Through Energy Efficiency Conference, San...

Williams, S.

2013-01-01T23:59:59.000Z

428

Organic LEDs for optoelectronic neural networks  

E-Print Network (OSTI)

In this thesis, I investigate the characteristics of Organic Light Emitting Diodes (OLEDs) and assess their suitability for use in the Compact Optoelectronic Integrated Neural (COIN) coprocessor. The COIN coprocessor, a ...

Mars, Risha R

2012-01-01T23:59:59.000Z

429

The effects of LED illumination spectra and intensity on carotenoid content in Brassicaceae microgreens  

Science Journals Connector (OSTI)

Abstract The objective of this study was to evaluate the effects of irradiance levels and spectra produced by solid-state light-emitting diodes (LEDs) on carotenoid content and composition changes in Brassicaceae microgreens. A system of five high-power, solid-state lighting modules with standard 447-, 638-, 665-, and 731-nm \\{LEDs\\} was used in the experiments. Two experiments were performed: (1) evaluation of LED irradiance levels of 545, 440, 330, 220, and 110 ?mol m?2 s?1 photosynthetically active flux density (PPFD) and (2) evaluation of the effects of 520-, 595-, and 622-nm \\{LEDs\\} supplemental to the standard set of LEDs. Concentrations of various carotenoids in red pak choi and tatsoi were higher under illumination of 330–440 ?mol m?2 s?1 and at 110–220 ?mol m?2 s?1 in mustard. All supplemental wavelengths increased total carotenoid content in mustard but decreased it in red pak choi. Carotenoid content increased in tatsoi under supplemental yellow light.

Aušra Brazaityt?; Sandra Sakalauskien?; Giedr? Samuolien?; Jul? Jankauskien?; Akvil? Viršil?; Algirdas Novi?kovas; Ram?nas Sirtautas; Jurga Miliauskien?; Viktorija Vaštakait?; Laurynas Dabašinskas; Pavelas Duchovskis

2015-01-01T23:59:59.000Z

430

A Statistical Method Analyzing LED Lumen Depreciation and Projecting LED Life  

SciTech Connect

There is a strong need for a method to represent the potential life of LED products as a critical part of design decisions including cost-effectiveness analysis. The IES LM-80 test method is in place to collect lumen depreciation data but it does not provide for estimation of future long term depreciation. Separate estimation methods are being considered (TM-21) and this paper describes the analysis of a series of LED degradation models and subsequent development of an estimation method. The work involves analysis of a set of engineering models to determine their applicability and define a structure for their use in LED lumen output life based on a lumen output level such as the L70 metric. The analysis has provided valuable information on methods effectively estimating LED life time, and impacts of measurement uncertainties, test duration, interval and other test conditions on selecting degradation models and LED life time projection. A set of guidelines are recommended to estimate LED life from data obtained using the current LM-80 test method.

Qiao, Hong (Amy) [Amy; Pulsipher, Trenton C.; Hathaway, John E.; Richman, Eric E.; Radkov, Emil

2010-05-30T23:59:59.000Z

431

Shining Energy-saving LEDs on Utah Starry Nights | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Shining Energy-saving LEDs on Utah Starry Nights Shining Energy-saving LEDs on Utah Starry Nights Shining Energy-saving LEDs on Utah Starry Nights June 11, 2010 - 4:27pm Addthis Stephen Graff Former Writer & editor for Energy Empowers, EERE Utah is known for its magnificent night skies, where stargazers can catch a glimpse of constellations or a rogue shooting star. Now some rural towns have found a way to create even better views-and conserve energy. This summer, thanks to an Energy Efficiency and Conservation Block Grant (EECBG) from the Utah State Energy Program worth over $1 million, 14 rural communities across the state are replacing streetlights with efficient light-emitting diodes (LEDs). About 2,500 streetlights will be replaced and could save the towns 20 percent to 50 percent on electricity bills.

432

Shining Energy-saving LEDs on Utah Starry Nights | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Shining Energy-saving LEDs on Utah Starry Nights Shining Energy-saving LEDs on Utah Starry Nights Shining Energy-saving LEDs on Utah Starry Nights June 11, 2010 - 4:27pm Addthis Stephen Graff Former Writer & editor for Energy Empowers, EERE Utah is known for its magnificent night skies, where stargazers can catch a glimpse of constellations or a rogue shooting star. Now some rural towns have found a way to create even better views-and conserve energy. This summer, thanks to an Energy Efficiency and Conservation Block Grant (EECBG) from the Utah State Energy Program worth over $1 million, 14 rural communities across the state are replacing streetlights with efficient light-emitting diodes (LEDs). About 2,500 streetlights will be replaced and could save the towns 20 percent to 50 percent on electricity bills.

433

Philips Lumileds Is Exploring the Use of Silicon Substrates to Lower the Cost of LEDs  

Energy.gov (U.S. Department of Energy (DOE))

With the help of DOE funding, Philips Lumileds is exploring the use of nitride epitaxy on 150mm silicon substrates to produce low-cost, warm-white, high-performance general-illumination LEDs. Most LEDs are made with C-plane sapphire substrates, but silicon—at roughly half a penny per square millimeter—is much cheaper, and it's also easier to obtain. Philips Lumileds is attempting to adapt the use of silicon to the manufacture of LEDs, drawing upon the knowledge base and depreciated equipment of the computer industry, which has been using silicon substrates for decades.

434

Issues, Models and Solutions for Triac Modulated Phase Dimming of LED Lamps  

E-Print Network (OSTI)

greater than incandescent lamps [1,2]. In fact, recent technological breakthroughs [3-7] in the high of LED lighting: An incandescent source produces 10 ­ 20 lumens/watt, while several manufacturers have? Incandescent bulbs primarily utilize phase modulating dimming through triac switches to control the power sent

Lehman, Brad

435

LEDS Toolkit and Framework | Open Energy Information  

Open Energy Info (EERE)

LEDS Toolkit and Framework LEDS Toolkit and Framework Jump to: navigation, search Tool Summary LAUNCH TOOL Name: LEDS Toolkit and Methodology Agency/Company /Organization: National Renewable Energy Laboratory Sector: Energy, Land, Water, Climate Topics: Low emission development planning Resource Type: Dataset User Interface: Website, Desktop Application Website: en.openei.org/apps/LEDS/ Cost: Free UN Region: Central Asia, Eastern Asia, South-Eastern Asia, "Pacific" is not in the list of possible values (Eastern Africa, Middle Africa, Northern Africa, Southern Africa, Western Africa, Caribbean, Central America, South America, Northern America, Central Asia, Eastern Asia, Southern Asia, South-Eastern Asia, Western Asia, Eastern Europe, Northern Europe, Southern Europe, Western Europe, Australia and New Zealand, Melanesia, Micronesia, Polynesia, Latin America and the Caribbean) for this property., "Latin America and Caribbean" is not in the list of possible values (Eastern Africa, Middle Africa, Northern Africa, Southern Africa, Western Africa, Caribbean, Central America, South America, Northern America, Central Asia, Eastern Asia, Southern Asia, South-Eastern Asia, Western Asia, Eastern Europe, Northern Europe, Southern Europe, Western Europe, Australia and New Zealand, Melanesia, Micronesia, Polynesia, Latin America and the Caribbean) for this property., "Western Asia & North Africa" is not in the list of possible values (Eastern Africa, Middle Africa, Northern Africa, Southern Africa, Western Africa, Caribbean, Central America, South America, Northern America, Central Asia, Eastern Asia, Southern Asia, South-Eastern Asia, Western Asia, Eastern Europe, Northern Europe, Southern Europe, Western Europe, Australia and New Zealand, Melanesia, Micronesia, Polynesia, Latin America and the Caribbean) for this property., Northern America, "South Asia" is not in the list of possible values (Eastern Africa, Middle Africa, Northern Africa, Southern Africa, Western Africa, Caribbean, Central America, South America, Northern America, Central Asia, Eastern Asia, Southern Asia, South-Eastern Asia, Western Asia, Eastern Europe, Northern Europe, Southern Europe, Western Europe, Australia and New Zealand, Melanesia, Micronesia, Polynesia, Latin America and the Caribbean) for this property., "Sub-Saharan Africa" is not in the list of possible values (Eastern Africa, Middle Africa, Northern Africa, Southern Africa, Western Africa, Caribbean, Central America, South America, Northern America, Central Asia, Eastern Asia, Southern Asia, South-Eastern Asia, Western Asia, Eastern Europe, Northern Europe, Southern Europe, Western Europe, Australia and New Zealand, Melanesia, Micronesia, Polynesia, Latin America and the Caribbean) for this property., "Western & Eastern Europe" is not in the list of possible values (Eastern Africa, Middle Africa, Northern Africa, Southern Africa, Western Africa, Caribbean, Central America, South America, Northern America, Central Asia, Eastern Asia, Southern Asia, South-Eastern Asia, Western Asia, Eastern Europe, Northern Europe, Southern Europe, Western Europe, Australia and New Zealand, Melanesia, Micronesia, Polynesia, Latin America and the Caribbean) for this property.

436

Solid-State Lighting: Text-Alternative Version: MSSLC Member Case Studies -  

NLE Websites -- All DOE Office Websites (Extended Search)

MSSLC MSSLC Member Case Studies - LED Street Lighting Programs Webinar to someone by E-mail Share Solid-State Lighting: Text-Alternative Version: MSSLC Member Case Studies - LED Street Lighting Programs Webinar on Facebook Tweet about Solid-State Lighting: Text-Alternative Version: MSSLC Member Case Studies - LED Street Lighting Programs Webinar on Twitter Bookmark Solid-State Lighting: Text-Alternative Version: MSSLC Member Case Studies - LED Street Lighting Programs Webinar on Google Bookmark Solid-State Lighting: Text-Alternative Version: MSSLC Member Case Studies - LED Street Lighting Programs Webinar on Delicious Rank Solid-State Lighting: Text-Alternative Version: MSSLC Member Case Studies - LED Street Lighting Programs Webinar on Digg Find More places to share Solid-State Lighting: Text-Alternative

437

Solid State Lighting Semiconductor Spectroscopy & Devices  

E-Print Network (OSTI)

than a light bulb, but they contain traces of toxic materials. LEDs utilise the movement of electrons information: jochen.bruckbauer@strath.ac.uk Overview Conventional light sources, like the light bulb and fluorescent lamps, are very inefficient in transforming energy into light. Due to upcoming problems in energy

Strathclyde, University of

438

Text-Alternative Version: LED Essentials- Technology, Applications, Advantages, Disadvantages  

Energy.gov (U.S. Department of Energy (DOE))

Below is the text-alternative version of the LED Essentials - Technology, Applications, Advantages, Disadvantages webcast.

439

Information Resources: Solid-State Lighting Videos  

NLE Websites -- All DOE Office Websites (Extended Search)

Videos Videos On this page you can access DOE Solid-State Lighting (SSL) Program videos. Photo of a museum art gallery with LED lights in track fixtures overhead. The City of Los Angeles LED Streetlight Program View the video about the Los Angeles LED streetlight program, featuring an interview with City of Los Angeles Bureau of Street Lighting Director, Ed Ebrahimian. Photo of a museum art gallery with LED lights in track fixtures overhead. The Smithsonian American Art Museum GATEWAY Demonstration View the video about using LEDs in a GATEWAY demonstration at the Smithsonian American Art Museum in Washington, DC, including an interview with lighting designer Scott Rosenfeld. graphic of many intersecting white lines on a blue background Orchestrating Market Success

440

Solar lighting | Open Energy Information  

Open Energy Info (EERE)

lighting lighting Jump to: navigation, search Introductory Facts About Solar Lights It is not just a normal light bulb.The solar light consists of a LED or Light Emitting Diode, which draw little power. Coupled with constantly recharging batteries, you will never run out of light! They will save the customer money. By Replacing all outdoor lighting with solar lights there is no need to plug in to the electrical system. The lights will automatically turn on at dusk and will be charged during the day. They help out the environment.Not only does not plugging in to the power system save money but also energy, therefore protecting the Earth. Easy to Install No wires necessary, just pop in the battery. They come in all designs Just because they are solar lights doesn't

Note: This page contains sample records for the topic "led general lighting" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


441

Designing light-emitting diode arrays for uniform near-field irradiance  

Science Journals Connector (OSTI)

We analyze the first-order design of light sources consisting of multiple light-emitting diodes (LEDs) to uniformly illuminate a near target plane by considering each single LED as...

Moreno, Ivan; Avendańo-Alejo, Maximino; Tzonchev, Rumen I

2006-01-01T23:59:59.000Z

442

Christmas Memories There was little to distinguish this particular avenue from those that led to and from  

E-Print Network (OSTI)

Christmas Memories There was little to distinguish this particular avenue from those that led, as a solitary lamppost umbrelled light onto the rain soaked pavement below. Steely, winter clouds hovered over glanced around the car. From the lamppost, abandoned strands of light found their way into the car

Veiga, Pedro Manuel Barbosa

443

In the OSTI Collections: LEDs | OSTI, US Dept of Energy, Office of  

Office of Scientific and Technical Information (OSTI)

LEDs LEDs User experiences Light-emitting diodes and phosphors Electronics to drive light-emitting diodes Getting the light out of the diode and onto where it's wanted Environmental effects References Research Organizations Patent Assignees Reports Available through OSTI's SciTech Connect Reports Available through OSTI's DOepatents Additional References As "efficiency" is often defined for technology, the efficiency of anything that changes energy into a usable form for some purpose is the fraction of the changed energy that actually winds up in the intended usable form. A heat engine, for instance, takes energy from some heat source and turns some fraction of it into mechanical energy. The maximum possible efficiency for a heat engine that operates in cycles between the

444

Study on electroluminescence from porous silicon light-emitting diode  

Science Journals Connector (OSTI)

Porous silicon (PS) light-emitting diode (LED) with an ITO/PS/p-Si/Al structure was fabricated by anodic oxidation method. Photoluminescence (PL) of the PS LED was measured with a...

Yang, Yajun; Li, Qingshan; Liu, Xianyun

2006-01-01T23:59:59.000Z

445

Category:LEDS Example | Open Energy Information  

Open Energy Info (EERE)

Example Example Jump to: navigation, search This page displays examples of country-scale low emission development strategies Pages in category "LEDS Example" The following 12 pages are in this category, out of 12 total. B Bangladesh Climate Change Strategy and Action Plan Brazil National Plan on Climate Change (PNMC) C China's National Climate Change Programme E ESMAP-South Africa-Low Carbon Growth Strategy G Guyana's Low Carbon Development Strategy I India National Action Plan on Climate Change Indonesia National Action Plan Addressing Climate Change J Japan-Action Plan for Achieving a Low-Carbon Society M Mexico's Special Program on Climate Change S Singapore National Climate Change Strategy T Thailand-National Energy Policy and Development Plan U United Kingdom Low Carbon Transition Plan

446

EK101 Engineering Light Project: Evaluate Residential Lighting  

E-Print Network (OSTI)

for residential lighting (LED, Compact Fluorescent, Incandescent). Develop a plan of experiments to be conducted, CF, and Incandescent bulbs for the past ten years. (try the wayback time machine if other sources fail). Discuss the key challenges associated with a transition from incandescent lighting

Bifano, Thomas

447

LED bulbs technical specification and testing procedure for solar home systems  

Science Journals Connector (OSTI)

Abstract The definition of technical specifications and the corresponding laboratory procedures are necessary steps in order to assure the quality of the devices prior to be installed in Solar Home Systems (SHS). To clarify and unify criteria a European project supported the development of the Universal Technical Standard for Solar Home Systems (UTSfSHS). Its principles were to generate simple and affordable technical requirements to be optimized in order to facilitate the implementation of tests with basic and simple laboratory tools even on the same SHS electrification program countries. These requirements cover the main aspects of this type of installations and its lighting chapter was developed based on the most used technology at that time: fluorescent tubes and CFLs. However, with the consolidation of the new LED solid state lighting devices, particular attention is being given to this matter and new procedures are required. In this work we develop a complete set of technical specifications and test procedures that have been designed within the frame of the UTSfSHS, based on an intense review of the scientific and technical publications related to LED lighting and their practical application. They apply to lamp reliability, performance and safety under normal, extreme and abnormal operating conditions as a simple but complete quality meter tool for any LED bulb. These tests have been applied to a group of 14 low-cost direct current LED bulbs and the accomplishment of the proposed requirements is analyzed.

Alfonso Gago Calderón; Luis Narvarte Fernández; Luis Miguel Carrasco Moreno; Javier Serón Barba

2015-01-01T23:59:59.000Z

448

Quantum Coherence in Photosynthetic Light  

E-Print Network (OSTI)

the following: How do light-harvesting systems deliver such high efficiency in the presence of disordered:333­61 First published online as a Review in Advance on December 13, 2011 The Annual Review of Condensed Matter quantum efficiency of photosynthetic light harvesting. Further, this speculation has led to much effort

Fleming, Graham R.

449

Asynchronous indoor positioning system based on visible light  

E-Print Network (OSTI)

employ fluorescent lamps and light-emitting diodes (LEDs). VLC-based techniques have the advantage of light-emitting diode bulbs. © 2014 Society of Photo-Optical Instrumentation Engineers (SPIE) [DOI: 10. Most of the VLC-based techniques use LEDs as the light source, since they can be modulated more easily

Kavehrad, Mohsen

450

Information Resources: Webinar: The L Prize-Winning LED A19  

NLE Websites -- All DOE Office Websites (Extended Search)

Webinar: The L Prize-Winning LED A19 Replacement-What Commercial Building Owners/Operators Can Expect in 2012 Webinar: The L Prize-Winning LED A19 Replacement-What Commercial Building Owners/Operators Can Expect in 2012 This January 18, 2012 webinar presented an update on the status of LED A19 lamp options for commercial businesses, with an overview of DOE's L Prize competition and the rigorous lab, lifetime, and field testing that went into selection of the winning lamp. During the webinar, Kelly Gordon of Pacific Northwest National Laboratory presented current A19 LED options and provided details on where LEDs are most competitive and ready. Gordon also shared insights on the L Prize competition winner, the role of partners in market development, and preliminary plans for promotions and incentives. Todd Manegold, Director of LED Lamps Marketing at Philips Lighting, outlined best applications for the winning lamp in commercial settings, Philips' plans for commercial distribution, and a financial calculator showing expected cost/payback using actual examples from field tests.

451

Dimming LEDs with Phase-Cut Dimmers: The Specifier's Process for Maximizing Success  

SciTech Connect

This report reviews how phase-cut dimmers work, how LEDs differ from the incandescent lamps that the dimmers were historically designed to control, and how these differences can lead to complications when trying to dim LEDs. Compatibility between a specific LED source and a specific phase-cut dimmer is often unknown and difficult to assess, and ensuring compatibility adds complexity to the design, specification, bidding, and construction observation phases for new buildings and major remodel projects. To maximize project success, this report provides both general guidance and step-by-step procedures for designing phase-controlled LED dimming on both new and existing projects, as well as real-world examples of how to use those procedures.

Miller, Naomi J.; Poplawski, Michael E.

2013-10-01T23:59:59.000Z

452

Green Light-Emitting Diode Makes Highly Efficient White Light, The Spectrum of Clean Energy Innovation (Fact Sheet)  

NLE Websites -- All DOE Office Websites (Extended Search)

Spectrum of Spectrum of Clean Energy Innovation innovati n Green Light-Emitting Diode Makes Highly Efficient White Light Scientists at the National Renewable Energy Laboratory (NREL) have invented a deep green light-emitting diode (LED) that can lead to higher efficiency white light, which is of prime value in the indoor lighting world. LEDs are fundamentally solar cells operating in reverse-that is, when an electrical current is applied to a thin-film semiconductor, the result is the emission of light. These devices are a key technology for producing a new generation of efficient lighting, in which the amount of light generated far outweighs the amount of heat produced. But at the moment, LEDs that emit white light are produced using an inefficient process known as phosphor conversion. In this process, light from a blue- or ultraviolet-emitting LED energizes

453

Stage 1: Organizing the LEDS Process | Open Energy Information  

Open Energy Info (EERE)

: Organizing the LEDS Process : Organizing the LEDS Process Jump to: navigation, search Stage 1 LEDS Home Introduction to Framework Assess current country plans, policies, practices, and capacities Develop_BAU Stage 4: Prioritizing and Planning for Actions Begin execution of implementation plans 1.0. Organizing the LEDS Process 1.1. Institutional Structure for LEDS 1.2. Workplan to Develop the LEDS 1.3. Roles and responsibilities to develop LEDS 2.1. Assess current country plans, policies, practices, and capacities 2.2. Compile lessons learned and good practices from ongoing and previous sustainable development efforts in the country 2.3. Assess public and private sector capacity to support initiatives 2.4. Assess and improve the national GHG inventory and other economic and resource data as needed for LEDS development

454

Identify roles and responsibilities for LEDS process | Open Energy  

Open Energy Info (EERE)

roles and responsibilities for LEDS process roles and responsibilities for LEDS process Jump to: navigation, search Stage 1 LEDS Home Introduction to Framework Assess current country plans, policies, practices, and capacities Develop_BAU Stage 4: Prioritizing and Planning for Actions Begin execution of implementation plans 1.0. Organizing the LEDS Process 1.1. Institutional Structure for LEDS 1.2. Workplan to Develop the LEDS 1.3. Roles and responsibilities to develop LEDS 2.1. Assess current country plans, policies, practices, and capacities 2.2. Compile lessons learned and good practices from ongoing and previous sustainable development efforts in the country 2.3. Assess public and private sector capacity to support initiatives 2.4. Assess and improve the national GHG inventory and other economic and resource data as needed for LEDS development

455

LED T8 Replacement Lamps | Department of Energy  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

T8 Replacement Lamps LED T8 Replacement Lamps This documents provides an overview of LED T8 replacement lamps and helps define a reasonable minimum performance level for the...

456

EM-Led Radiological Incident Response Program Receives Honors...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

EM-Led Radiological Incident Response Program Receives Honors EM-Led Radiological Incident Response Program Receives Honors May 29, 2014 - 12:00pm Addthis Jessie Welch performs...

457

12RESEARCHERS Western-led creation of  

E-Print Network (OSTI)

-generation renewable energy sources from wind, sun and biofuels for a greener world BRAZIL Impact / Reputation global delegation to Brazil, accompanied by Governor General David Johnston, in April 2012 alternative energy Next from renewable sources. "Just because Canada has discovered Brazil, doesn't mean Brazil will dance

Denham, Graham

458

The Influence of Photoperiod History on Circadian Response to Light  

E-Print Network (OSTI)

fluorescent bulbs (F4T5) (105 µW/cm 2 ) for the photophase and narrowband light-emitting diodes (LEDs)fluorescent bulbs (F4T5) (105 µW/cm2) while dark phases (scotophases) were dimly illuminated by narrowband light-emitting diodes (LEDs)fluorescent bulbs (F4T5) (105 µW/cm2) while dark phases (scotophases) were dimly illuminated by narrowband light-emitting diodes (LEDs)

Glickman, Gena Lynne

459

Text-Alternative Version: LEDs for Interior Office Applications  

Energy.gov (U.S. Department of Energy (DOE))

Below is the text-alternative version of the LEDs for Interior Office Applications webcast, held March 18, 2010.

460

Text-Alternative Version: LED Replacements for Linear Fluorescent Lamps  

Energy.gov (U.S. Department of Energy (DOE))

Below is the text-alternative version of the "LED Replacements for Linear Fluorescent Lamps" webcast, held June 20, 2011.

Note: This page contains sample records for the topic "led general lighting" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


461

Peninsula Light Company - Commercial Efficient Lighting Rebate Program |  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Peninsula Light Company - Commercial Efficient Lighting Rebate Peninsula Light Company - Commercial Efficient Lighting Rebate Program Peninsula Light Company - Commercial Efficient Lighting Rebate Program < Back Eligibility Commercial Savings Category Appliances & Electronics Commercial Lighting Lighting Program Info State District of Columbia Program Type Utility Rebate Program Rebate Amount General: 30% - 70% of cost Provider Peninsula Light Company Peninsula Light Company (PLC) offers a rebate program for commercial customers who wish to upgrade to energy efficient lighting. Participating customers must be served by PLC commercial service. Customers who upgrade to highly efficient fixtures and systems are eligible to receive a rebate generally covering 30% - 70% of the project cost. These retrofits improve light quality and reduce energy costs in participating facilities. PLC

462

Semiconductors 4-bit I2C LED dimmer  

E-Print Network (OSTI)

Philips Semiconductors PCA9533 4-bit I2C LED dimmer Product data sheet Supersedes data of 2003 Sep 19 2004 Oct 01 INTEGRATED CIRCUITS #12;Philips Semiconductors Product data sheet PCA95334-bit I2C LED dimmer 22004 Oct 01 FEATURES · 4 LED drivers (on, off, flashing at a programmable rate) · 2 selectable

Berns, Hans-Gerd

463

Enhancement-led institutional review University of St Andrews  

E-Print Network (OSTI)

Enhancement-led institutional review University of St Andrews MARCH 2011 #12;ďż˝ The Quality on our website www.qaa.ac.uk Registered charity numbers 1062746 and SC037786 #12;Enhancement-led institutional review University of St Andrews Introduction 1 This is the report of an Enhancement-led

Brierley, Andrew

464

Summary report on the Enhancement-led institutional review  

E-Print Network (OSTI)

Summary report on the Enhancement-led institutional review University of St Andrews MARCH 2011 #12 education institutions. In Scotland, this process is known as Enhancement-led institutional review (ELIR). QAA operates equivalent but separate processes in England, Northern Ireland and Wales. The enhancement-led

Brierley, Andrew

465

Categorization of Software Errors that led to Security Breaches  

E-Print Network (OSTI)

Categorization of Software Errors that led to Security Breaches Wenliang Du Email: duw University, W. Lafayette, IN 47907, USA Abstract A set of errors known to have led to security breaches in computer systems was analyzed. The analysis led to a categorization of these errors. After examining

Du, Wenliang "Kevin"

466

A New, Simple, "universal", Low Cost LED Driver and Controller  

E-Print Network (OSTI)

A New, Simple, "universal", Low Cost LED Driver and Controller Akram M. Fayaz Sup´elec Department:daniel.sadarnac@supelec.fr Abstract--In this paper a new LED driver and its controller are conceived realized and experimentally approach the average current through the LED is directly regulated. The proposed driver is built around

Paris-Sud XI, Université de

467

Summary report on the Enhancement-led institutional review  

E-Print Network (OSTI)

Summary report on the Enhancement-led institutional review University of Glasgow APRIL 2010 #12 reviews of higher education institutions. In Scotland, this process is known as Enhancement-led and Wales. The enhancement-led approach ELIR is one element of the Quality Enhancement Framework which

Guo, Zaoyang

468

Thermal design and simulation of automotive headlamps using white LEDs  

Science Journals Connector (OSTI)

With an urgent need for energy conservation and pollution reduction, the trend of replacing traditional incandescent or fluorescent lamps with high-power LEDs is growing more and more popular. In this research, high power white LED chips are used in ... Keywords: Automitive headlamp, Heat pipe, High power LED, Junction temperature

Jing Wang; Yi-Xi Cai; Xin-Jie Zhao; Chun Zhang

2014-02-01T23:59:59.000Z

469

Light-Emitting Diodes on Semipolar Bulk Gallium Nitride Substrate  

Energy.gov (U.S. Department of Energy (DOE))

This project is producing high-efficiency semipolar light-emitting diodes (LEDs) on low-defect bulk gallium nitride (GaN) substrates.

470

EECBG Success Story: Light Shines on Better Budget for Glendale...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

along with state representatives and community leaders, cut the ribbon for the state's solar LED light pilot project. | Photo courtesy of Lionel Green, Sand Mountain Reporter....

471

Lifeworld-led healthcare is more than patient-led care: an existential view of well-being  

Science Journals Connector (OSTI)

In this paper we offer an appreciation and critique of patient-led care as expressed in current policy and practice. We argue that current patient-led approaches hinder a focus on a deeper understanding of what p...

Karin Dahlberg; Les Todres; Kathleen Galvin

2009-08-01T23:59:59.000Z

472

Brief Communications Nocturnal Light Exposure Impairs Affective Responses in a  

E-Print Network (OSTI)

conditions have led to excessive exposure to light at night (LAN), and particularly to blue wavelength lights include television and computer screens, light pollution, shift work, compact fluorescent light (CFL) bulbs, and trans- meridian travel. ipRGCs are maximally sensitive to blue light ( 480 nm) and minimally

Nelson, Randy J.

473

Color demultiplexer using angularly multiplexed volume holograms as a receiver optical end for VLC based on RGB white LED  

Science Journals Connector (OSTI)

Abstract The visible light communication (VLC) based on RGB white LED can obtain high communication rate, because the RGB white LED light source has a wide bandwidth by modulating each color respectively. The receiver optical end of the VLC system based on RGB white LED is commonly composed of three optical filters and three lenses. However, it is relatively large size and no integration. In this paper, we propose and experimentally demonstrate a simple and efficient color demultiplexer based on the volume holographic gratings that can separate RGB light and focus each color on different directions. The expression of the volume holographic grating vector with curved interference fringes is derived. There is an important discovery that spectral selectivity and angular selectivity change on the different positions of volume holographic grating. The filtering property and diffraction efficiency of color demultiplexer are measured and analyzed.

Zhenmin Shen; Tian Lan; Longhui Wang; Guoqiang Ni

2014-01-01T23:59:59.000Z

474

Trial Demonstration of Area Lighting Retrofit  

Energy.gov (U.S. Department of Energy (DOE))

LED Area Lighting Retrofit: Yuma Border Patrol Along the Yuma Sector Border Patrol Area in Yuma, Arizona, the GATEWAY program conducted a trial demonstration in which the incumbent quartz metal halide area lighting was replaced with LED at three pole locations. The LED system was found to equal or better the incumbent system in terms of both illuminance and uniformity, and an advanced optical system and lower pole height improved the illuminance uniformity, reduced stray light, and increased projected energy and maintenance cost savings. This high luminous flux and high temperature application is not unique and similar applications can benefit from the findings of this installation.

475

Active packing method for blue light-emitting diodes with photosensitive polymerization: formation of self-focusing encapsulates  

Science Journals Connector (OSTI)

A novel light-emitting diode (LED) packaging method, named the active packaging (AP) method, is presented in this paper. In this method, during the LED packaging process, the light...

Wang, Hao; Ryu, Jae-Hyoung; Lee, Kyu-Seung; Tan, Chun Hua; Jin, Lihua; Li, Songmei; Hong, Chang-Hee; Cho, Yong-Hoon; Liu, Songhao

2008-01-01T23:59:59.000Z

476

Stage 1: Organizing the LEDS Process | Open Energy Information  

Open Energy Info (EERE)

Stage 1: Organizing the LEDS Process Stage 1: Organizing the LEDS Process (Redirected from Low Emission Development Strategies Methodology) Jump to: navigation, search Stage 1 LEDS Home Introduction to Framework Assess current country plans, policies, practices, and capacities Develop_BAU Stage 4: Prioritizing and Planning for Actions Begin execution of implementation plans 1.0. Organizing the LEDS Process 1.1. Institutional Structure for LEDS 1.2. Workplan to Develop the LEDS 1.3. Roles and responsibilities to develop LEDS 2.1. Assess current country plans, policies, practices, and capacities 2.2. Compile lessons learned and good practices from ongoing and previous sustainable development efforts in the country 2.3. Assess public and private sector capacity to support initiatives 2.4. Assess and improve the national GHG inventory and other

477

LEDSGP/about/Asia LEDS Partnership | Open Energy Information  

Open Energy Info (EERE)

source source History View New Pages Recent Changes All Special Pages Semantic Search/Querying Get Involved Help Apps Datasets Community Login | Sign Up Search Page Edit History Facebook icon Twitter icon » LEDSGP/about/Asia LEDS Partnership < LEDSGP‎ | about(Redirected from Asia LEDS Partnership) Jump to: navigation, search LEDSGP Logo.png Advancing climate-resilient low emission development around the world Home About Tools Expert Assistance Events Publications Join Us About How We Work > Regional Platforms > Working Groups LEDS GP Members Steering Committee Guiding Structure Contacts Asia LEDS Partnership (ALP) A LEDS GP Regional Network ALT Steering Committee ALP Steering Committee The Asia LEDS Partnership Steering Committee met on March, 2013 in Pattaya, Thailand following the LEDS Global Partnership second annual workshop to

478

CALiPER Report 21.3: Cost-Effectiveness of Linear (T8) LED Lamps  

SciTech Connect

Meeting performance expectations is important for driving adoption of linear LED lamps, but cost-effectiveness may be an overriding factor in many cases. Linear LED lamps cost more initially than fluorescent lamps, but energy and maintenance savings may mean that the life-cycle cost is lower. This report details a series of life-cycle cost simulations that compared a two-lamp troffer using LED lamps (38 W total power draw) or fluorescent lamps (51 W total power draw) over a 10-year study period. Variables included LED system cost ($40, $80, or $120), annual operating hours (2,000 hours or 4,000 hours), LED installation time (15 minutes or 30 minutes), and melded electricity rate ($0.06/kWh, $0.12/kWh, $0.18/kWh, or $0.24/kWh). A full factorial of simulations allows users to interpolate between these values to aid in making rough estimates of economic feasibility for their own projects. In general, while their initial cost premium remains high, linear LED lamps are more likely to be cost-effective when electric utility rates are higher than average and hours of operation are long, and if their installation time is shorter.

Miller, Naomi J.; Perrin, Tess E.; Royer, Michael P.

2014-05-27T23:59:59.000Z

479

A portable time-domain LED fluorimeter for nanosecond fluorescence lifetime measurements  

SciTech Connect

Fluorescence lifetime measurements are becoming increasingly important in chemical and biological research. Time-domain lifetime measurements offer fluorescence multiplexing and improved handling of interferers compared with the frequency-domain technique. In this paper, an all solid-state, filterless, and highly portable light-emitting-diode based time-domain fluorimeter (LED TDF) is reported for the measurement of nanosecond fluorescence lifetimes. LED based excitation provides more wavelengths options compared to laser diode based excitation, but the excitation is less effective due to the uncollimated beam, less optical power, and longer latency in state transition. Pulse triggering and pre-bias techniques were implemented in our LED TDF to improve the peak optical power to over 100 mW. The proposed pulsing circuit achieved an excitation light fall time of less than 2 ns. Electrical resetting technique realized a time-gated photo-detector to remove the interference of the excitation light with fluorescence. These techniques allow the LED fluorimeter to accurately measure the fluorescence lifetime of fluorescein down to concentration of 0.5 ?M. In addition, all filters required in traditional instruments are eliminated for the non-attenuated excitation/emission light power. These achievements make the reported device attractive to biochemical laboratories seeking for highly portable lifetime detection devices for developing sensors based on fluorescence lifetime changes. The device was initially validated by measuring the lifetimes of three commercial fluorophores and comparing them with reported lifetime data. It was subsequently used to characterize a ZnSe quantum dot based DNA sensor.

Wang, Hongtao; Salthouse, Christopher D., E-mail: salthouse@ecs.umass.edu [Electrical and Computer Engineering Department, University of Massachusetts, Amherst, Massachusetts 01003 (United States); Center for Personalized Health Monitoring, University of Massachusetts, Amherst, Massachusetts 01003 (United States); Qi, Ying; Mountziaris, T. J. [Center for Personalized Health Monitoring, University of Massachusetts, Amherst, Massachusetts 01003 (United States) [Center for Personalized Health Monitoring, University of Massachusetts, Amherst, Massachusetts 01003 (United States); Chemical Engineering Department, University of Massachusetts, Amherst, Massachusetts 01003 (United States)

2014-05-15T23:59:59.000Z

480

Energy-Efficient, High-Color-Rendering LED Lamps Using Oxyfluoride and Fluoride Phosphors  

SciTech Connect

LED lamps using phosphor downconversion can be designed to replace incandescent or halogen sources with a 'warm-white' correlated color temperature (CCT) of 2700-3200 K and a color rendering index (CRI) greater than 90. However, these lamps have efficacies of {approx}70% of standard 'cool-white' LED packages (CCT = 4500-6000 K; CRI = 75-80). In this report, we describe structural and luminescence properties of fluoride and oxyfluoride phosphors, specifically a (Sr,Ca){sub 3}(Al,Si)O{sub 4}(F,O):Ce{sup 3+} yellow-green phosphor and a K{sub 2}TiF{sub 6}:Mn{sup 4+} red phosphor, that can reduce this gap and therefore meet the spectral and efficiency requirements for high-efficacy LED lighting. LED lamps with a warm-white color temperature (3088 K), high CRI (90), and an efficacy of {approx}82 lm/W are demonstrated using these phosphors. This efficacy is {approx}85% of comparable cool-white lamps using typical Y{sub 3}Al{sub 5}O{sub 12}:Ce{sup 3+}-based phosphors, significantly reducing the efficacy gap between warm-white and cool-white LED lamps that use phosphor downconversion.

Setlur, A.; Radkov, E; Henderson, C; Her, J; Srivastava, A; Karkada, N; Kishore, M; Kumar, N; Aesram, D; et al.

2010-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "led general lighting" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


481

Solid-State Lighting: Solid-State Lighting GATEWAY Demonstration Results  

NLE Websites -- All DOE Office Websites (Extended Search)

Solid-State Lighting GATEWAY Solid-State Lighting GATEWAY Demonstration Results to someone by E-mail Share Solid-State Lighting: Solid-State Lighting GATEWAY Demonstration Results on Facebook Tweet about Solid-State Lighting: Solid-State Lighting GATEWAY Demonstration Results on Twitter Bookmark Solid-State Lighting: Solid-State Lighting GATEWAY Demonstration Results on Google Bookmark Solid-State Lighting: Solid-State Lighting GATEWAY Demonstration Results on Delicious Rank Solid-State Lighting: Solid-State Lighting GATEWAY Demonstration Results on Digg Find More places to share Solid-State Lighting: Solid-State Lighting GATEWAY Demonstration Results on AddThis.com... LED Lighting Facts CALiPER Program Standards Development Technical Information Network Gateway Demonstrations FAQs Results

482

Solid-State Lighting: DOE Municipal Solid-State Street Lighting Consortium  

NLE Websites -- All DOE Office Websites (Extended Search)

Market-Based Programs Printable Version Share this resource Send a link to Solid-State Lighting: DOE Municipal Solid-State Street Lighting Consortium to someone by E-mail Share Solid-State Lighting: DOE Municipal Solid-State Street Lighting Consortium on Facebook Tweet about Solid-State Lighting: DOE Municipal Solid-State Street Lighting Consortium on Twitter Bookmark Solid-State Lighting: DOE Municipal Solid-State Street Lighting Consortium on Google Bookmark Solid-State Lighting: DOE Municipal Solid-State Street Lighting Consortium on Delicious Rank Solid-State Lighting: DOE Municipal Solid-State Street Lighting Consortium on Digg Find More places to share Solid-State Lighting: DOE Municipal Solid-State Street Lighting Consortium on AddThis.com... LED Lighting Facts

483

Fabrication of SiNx-based photonic crystals on GaN-based LED devices with patterned sapphire substrate by nanoimprint lithography  

Science Journals Connector (OSTI)

SiNx-based photonic crystal (PhC) patterns were fabricated on the ITO electrode layer of a GaN-based light-emitting diode (LED) device on a patterned sapphire substrate...

Byeon, Kyeong-Jae; Cho, Joong-Yeon; Kim, Jinseung; Park, Hyoungwon; Lee, Heon

2012-01-01T23:59:59.000Z

484

The Elusive “Life” of LEDs: How TM-21 Contributes to the Solution  

SciTech Connect

This magazine article discusses the issue of LED 'lifetime' and explains where TM-21 plays as part of the solution to this issue. In August 2011, the Illuminating Engineering Society (IES) published the TM-21 document entitled 'Lumen degradation lifetime estimation method for LED light sources.' TM-21 is the IES-recommended method for projecting lumen degradation of an LED package, array or module based on data collected according to LM-80. The lighting community expects TM-21 to become the standard method for projecting useful LED lighting product life at realistic operating temperature. This article presents the development process behind TM-21, and clarifies how and when to apply the lifetime extrapolation method to arrive at reasonable and useful estimations. Why TM-21 and why now? We are all familiar with the very real but sometimes exaggerated long-life attributes of LED technology. Not the least of these is the potential for very long life that helps make it an attractive design choice. The trick has been and continues to be how to measure or estimate this longevity to provide assurance to users of this technology's reliability (life) compared to other options. We also understand that the overall reliability of a complete LED lighting fixture can be affected by the reliability of individual product components (driver, lens, etc.) and should be accounted for in lifetime estimations. The useful life of standard lighting technologies is defined as the time to filament or cathode failure. For most of these lamps, the time period prior to failure exhibits acceptable levels of light output, as shown with the solid lines in Fig. 1. This makes it easy to determine when to replace the lamp. However, LEDs do not have filament burn-out that conveniently announces the end of life (dashed line in Fig. 1). Further, the rapid development of the technology and the desire to bring products to market in a timely manner does not allow for actual testing verification of the long lives claimed (100,000 or even 35,000 hours). As a result, the industry has come to accept a definition of the end of the useful life of an LED as the point when it no longer provides a specified level of light output. And finally, the life and performance of LED lighting products depends greatly on excess heat retained at the diode. This is why LEDs require testing at multiple temperatures such that when a source is installed in a luminaire, its actual operating temperature can be measured and lumen depreciation of the product can be derived. Therefore, to serve the solid-state lighting industry, the Technical Procedures Committee (TPC) of the IES proceeded to develop appropriate tests for use in rating LED product longevity. The initial need was a measure of the basic lumen degradation of LED source components identified by a module, package, or array of diodes and this came in the form of LM-80. Importantly, LM-80 only specifies how to measure lumen depreciation to a minimum of 6000 hours (but recommends testing to 10,000 hours or longer). LM-80 stops short of using that data to estimate any depreciation after that, which is where TM-21 comes in. The TM-21 working group (WG) as part of the IES TPC was formed to develop the lumen depreciation projection method and spent over three years exploring many options. The WG evaluated various projection options starting with an analysis of various mathematical, engineering-based models to provide effective depreciation fit and a useful projection method. Next, the WG analyzed LED lumen maintenance behavior using over 40 sets of LM-80-08 test data (20 sets with 10,000 hours or more) collected from four major LED manufacturers. The working group also examined the accuracy of proposed projections using various proposed models and LM-80 data that extended up to 15,000 hours.

Richman, Eric E.

2011-11-18T23:59:59.000Z

485

Solid-State Lighting: Publications  

NLE Websites -- All DOE Office Websites (Extended Search)

Publications to someone by Publications to someone by E-mail Share Solid-State Lighting: Publications on Facebook Tweet about Solid-State Lighting: Publications on Twitter Bookmark Solid-State Lighting: Publications on Google Bookmark Solid-State Lighting: Publications on Delicious Rank Solid-State Lighting: Publications on Digg Find More places to share Solid-State Lighting: Publications on AddThis.com... Conferences & Meetings Presentations Publications Postings Articles Program Fact Sheets Technology Fact Sheets CALiPER Reports GATEWAY Reports LED Lighting Facts Reports Project Reports Studies and Reports Technology Roadmaps Product Performance Guides Webcasts Videos Tools Publications The Solid-State Lighting (SSL) program produces a comprehensive portfolio of publications, ranging from overviews of the program's research

486

About the DOE Municipal Solid-State Street Lighting Consortium  

Energy.gov (U.S. Department of Energy (DOE))

Numerous cities and organizations around the nation are announcing plans to conduct large scale retrofits/comparisons of LED street and area lighting products with their conventional street lights.

487

"1. General James M Gavin","Coal","Ohio Power Co",2640 "2. J M Stuart","Coal","Dayton Power & Light Co",2317  

U.S. Energy Information Administration (EIA) Indexed Site

Ohio" Ohio" "1. General James M Gavin","Coal","Ohio Power Co",2640 "2. J M Stuart","Coal","Dayton Power & Light Co",2317 "3. W H Sammis","Coal","FirstEnergy Generation Corp",2233 "4. Cardinal","Coal","Cardinal Operating Co",1800 "5. Conesville","Coal","Columbus Southern Power Co",1695 "6. Muskingum River","Coal","Ohio Power Co",1375 "7. Walter C Beckjord","Coal","Duke Energy Ohio Inc",1304 "8. W H Zimmer","Coal","Duke Energy Ohio Inc",1300 "9. Hanging Rock Energy Facility","Gas","Duke Energy Ohio Inc",1288

488

High-Efficiency Non-Polar GaN-Based LEDs  

SciTech Connect

Inlustra Technologies with subcontractor U.C. Santa Barbara conducted a project with the principle goal of demonstrating high internal quantum efficiency blue (430 nm) and green (540nm) light emitting diodes (LEDs) on low-defect density non-polar GaN wafers. Inlustra pursued the fabrication of smooth thick a-plane and m-plane GaN films, as well as defect reduction techniques such as lateral epitaxial overgrowth (LEO) to uniformly lower dislocation density in these films. Limited free-standing wafers were produced as well. By the end of the reporting period, Inlustra had met its milestone of dislocation reduction to < 5 x 10{sup 6} cm{sup -2}. Stacking faults were still present in appreciable density ({approx} 1 x 10{sup 5} cm{sup -1}), but were not the primary focus of defect reduction since there have been no published studies establishing their detrimental effects on LED performance. Inlustra's LEO progress built a solid foundation upon which further commercial development of GaN substrates will occur. UCSB encountered multiple delays in its LED growth and fabrication efforts due to unavoidable facilities outages imposed by ongoing construction in an area adjacent to the metalorganic chemical vapor deposition (MOCVD) laboratory. This, combined with the large amount of ab initio optimization required for the MOCVD system used during the project, resulted in unsatisfactory LED progress. Although numerous blue-green photoluminescence results were obtained, only a few LED structures exhibited electroluminescence at appreciable levels. UCSB also conducting extensive modeling (led by Prof. Van de Walle) on the problem of non-radiative Auger recombination in GaN-based LED structures, which has been posited to contribute to LED efficiency 'droop' at elevated current density. Unlike previous modeling efforts, UCSB's approach was truly a first-principles ab initio methodology. Building on solid numerical foundations, the Auger recombination rates of In{sub x}Ga{sub 1-x}N alloys were calculated from first-principles density-functional and many-body-perturbation theory. The differing mechanisms of inter- and intra-band recombination were found to affect different parts of the emission spectrum. In the blue to green spectral region and at room temperature the Auger coefficient was calculated to be as large as 2 x 10{sup -30} cm{sup 6} s{sup -1}; in the infrared it is even larger. These results indicated that Auger recombination may be responsible for the loss of quantum efficiency that affects InGaN-based light emitters, whether on non-polar or polar crystal planes.

Paul Fini

2010-11-30T23:59:59.000Z

489

IADB/UNDP LEDS Community of Practice | Open Energy Information  

Open Energy Info (EERE)

IADB/UNDP LEDS Community of Practice IADB/UNDP LEDS Community of Practice Jump to: navigation, search Name IADB/UNDP LEDS Community of Practice Agency/Company /Organization Inter-American Development Bank, United Nations Development Programme (UNDP) Sector Climate, Energy Focus Area People and Policy Topics Low emission development planning, -LEDS, Policies/deployment programs Website http://finanzascarbono.org/com References LEDS Community of Practice-Carbon Finance Platform[1] "The objective of this Community of Practice is to provide the LAC region with information and facilitate technical discussions about the process of preparing national Low Emission Development Strategies. The workplan for 2012 includes the organization of discussion forums, seminars and webinars on LEDS preparation.

490

Enhancing Capacity for Low Emission Development Strategies (EC-LEDS):  

Open Energy Info (EERE)

Enhancing Capacity for Low Emission Development Strategies (EC-LEDS): Enhancing Capacity for Low Emission Development Strategies (EC-LEDS): Distributed Generation Jump to: navigation, search Tool Summary LAUNCH TOOL Name: Enhancing Capacity for Low Emission Development Strategies (EC-LEDS): Distributed Generation Agency/Company /Organization: National Renewable Energy Laboratory Sector: Energy Topics: Low emission development planning, -LEDS Resource Type: Webinar Website: eeredev.nrel.gov/_proofs/video/2013_EC-LEDS/ Cost: Free References: Enhancing Capacity for Low Emission Development Strategies (EC-LEDS): Distributed Generation[1] Overview A webinar on distributed generation, presented by the National Renewable Energy Laboratory, with funding from the U.S. Agency for International Development. This webinar covers the basics of distributed generation, with an emphasis

491

Sandia National Laboratories: Solid-State Lighting  

NLE Websites -- All DOE Office Websites (Extended Search)

electroluminescence was first reported by H.J. Round in 1907, and the first light-emitting diode (LED) was reported by O.V. Losev in 1927. Not until the birth of semiconductor...

492

Thermal pumping of light-emitting diodes  

E-Print Network (OSTI)

The work presented here is a study of thermally enhanced injection in light-emitting diodes (LEDs). This effect, which we refer to as "thermal pumping", results from Peltier energy exchange from the lattice to charge ...

Gray, Dodd (Dodd J.)

2011-01-01T23:59:59.000Z

493

The future of Lighting: Beyond Saving Energy  

Science Journals Connector (OSTI)

The potential of new (LED) lighting technologies to save energy is overwhelming. The impact, however, will be much broader than that. In this talk I will give examples of revolutionary...

Vegter, Klaas

494

Deputy Secretary Poneman Announces Team led by Oak Ridge National...  

Office of Environmental Management (EM)

Deputy Secretary Poneman Announces Team led by Oak Ridge National Lab Selected to Receive up to 122 Million for Nuclear Energy Innovation Hub Deputy Secretary Poneman Announces...

495

Adopting LED Technology: What Federal Facility Managers Need to Know  

Energy.gov (U.S. Department of Energy (DOE))

This document describes the presentation slides for the "Adopting LED Technology: What Federal Facility Managers Need to Know" webinar that took place on September 11, 2014.

496

Secretary Chu Announces Funding for 71 University-Led Nuclear...  

NLE Websites -- All DOE Office Websites (Extended Search)

Secretary Chu Announces Funding for 71 University-Led Nuclear Research and Development Projects WASHINGTON, DC U.S. Energy Secretary Steven Chu today announced the selection of...

497

Technology makes reds "pop" in LED displays | GE Global Research  

NLE Websites -- All DOE Office Websites (Extended Search)

Televisions Research breakthrough will vastly improve color and crispness of images on LED devices NISKAYUNA, NY, July, 24, 2014 - GE announced today a research breakthrough that...

498

Energy Department Announces New University-Led Projects to Create...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Projects to Create More Efficient, Lower Cost Concentrating Solar Power Systems Energy Department Announces New University-Led Projects to Create More Efficient, Lower Cost...

499

LED Phosphor Modeling and Color Optimization in OptisWorks  

Science Journals Connector (OSTI)

OPTIS has developed in OptisWorks an editor for LED phosphor dyes which take into account physics based measureable spectra information as well as the volume scattering ...

Hasna, Günther

500

Cooking Up New Nanoribbons to Make Better White LEDs | Advanced...  

NLE Websites -- All DOE Office Websites (Extended Search)

Subscribe to APS Science Highlights rss feed Cooking Up New Nanoribbons to Make Better White LEDs FEBRUARY 24, 2014 Bookmark and Share The researchers fabricated three types of...