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Title: GATEWAY Report Brief: SSL Demonstration: Long-Term Evaluation of Indoor Field Performance

Abstract

Report brief summarizing a GATEWAY program evaluation of the long-term performance characteristics (chromaticity change, maintained illuminance, and operations and maintenance) of LED lighting systems in four field installations previously documented in separate DOE GATEWAY reports.

Authors:
Publication Date:
Research Org.:
EERE Publication and Product Library (United States)
Sponsoring Org.:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Building Technologies Office (EE-5B)
OSTI Identifier:
1377010
Report Number(s):
DOE/EE-1542
7738
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION; SSL; GATEWAY; LED; performance; interior; hotel; hospital; laboratory; arts; retrofit; luminaire; color

Citation Formats

None, None. GATEWAY Report Brief: SSL Demonstration: Long-Term Evaluation of Indoor Field Performance. United States: N. p., 2017. Web. doi:10.2172/1377010.
None, None. GATEWAY Report Brief: SSL Demonstration: Long-Term Evaluation of Indoor Field Performance. United States. doi:10.2172/1377010.
None, None. Tue . "GATEWAY Report Brief: SSL Demonstration: Long-Term Evaluation of Indoor Field Performance". United States. doi:10.2172/1377010. https://www.osti.gov/servlets/purl/1377010.
@article{osti_1377010,
title = {GATEWAY Report Brief: SSL Demonstration: Long-Term Evaluation of Indoor Field Performance},
author = {None, None},
abstractNote = {Report brief summarizing a GATEWAY program evaluation of the long-term performance characteristics (chromaticity change, maintained illuminance, and operations and maintenance) of LED lighting systems in four field installations previously documented in separate DOE GATEWAY reports.},
doi = {10.2172/1377010},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Feb 28 00:00:00 EST 2017},
month = {Tue Feb 28 00:00:00 EST 2017}
}

Technical Report:

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  • The GATEWAY program evaluated the long-term performance characteristics (chromaticity change, maintained illuminance, and operations and maintenance) of LED lighting systems in four field installations previously documented in separate DOE GATEWAY reports.
  • This GATEWAY project evaluated four field installations to better understand the long-term performance of a number of LED products, which can hopefully stimulate improvements in designing, manufacturing, specifying, procuring, and installing LED products. Field studies provide the opportunity to discover and investigate issues that cannot be simulated or uncovered in a laboratory, but the installed performance over time of commercially available LED products has not been well documented. Improving long-term performance can provide both direct energy savings by reducing the need to over-light to account for light loss and indirect energy savings through better market penetration due to SSL’s competitivemore » advantages over less-efficient light source technologies. The projects evaluated for this report illustrate that SSL use is often motivated by advantages other than energy savings, including maintenance savings, easier integration with control systems, and improved lighting quality.« less
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  • The report gives results of a study of short- and long-term variations in radon concentration in about 80 houses in Florida. The study involves comparative sampling using the most common radon measurement technologies during the past year. The study, addresses the time variation of indoor radon concentrations. The degree of variation of radon varies roughly in proportion to the long-term mean concentration, with a coefficient of variation within a calendar quarter of about 25% of the quarterly mean, and a coefficient of variationwithin a year of about 35% of the annual mean. The pattern of variability supports the use ofmore » multiplicative models to fit the variation and to predict intervals of confidence for long-term averages based on short-term measurements. These models have been used to develop threshold values for the performance criteria of the proposed Building Standard for Radon-resistant Construction for the State of Florida.« less
  • The report gives results of a study of short- and long-term variations in radon concentration in about 80 houses in Florida. The study involves comparative sampling using the most common radon measurement technologies during the past year. The study, providing the most detailed database addresses the time variation of indoor radon concentrations in a significant number of occupied houses having moderately elevated radon concentrations. In the study houses, the degree of variation of radon varies roughly in proportion to the long-term mean concentration, with a coefficient of variation within a calendar quarter of about 25% of the quarterly mean, andmore » a coefficient of variation within a year of about 35% of the annual mean. The study indicates a distinct seasonal effect on the average radon, with quarterly averages relative to the annual average increasing in the order of spring (82%) < summer (93%) < fall (97%) < winter (123%).« less