CALiPER Report 21.2. Linear (T8) LED Lamp Performance in Five Types of Recessed Troffers
Abstract
Although lensed troffers are numerous, there are many other types of optical systems as well. This report looks at the performance of three linear (T8) LED lamps—chosen primarily based on their luminous intensity distributions (narrow, medium, and wide beam angles)—as well as a benchmark fluorescent lamp in five different troffer types. Also included are the results of a subjective evaluation. Results show that linear (T8) LED lamps can improve luminaire efficiency in K12-lensed and parabolic-louvered troffers, effect little change in volumetric and high-performance diffuse-lensed type luminaires, but reduce efficiency in recessed indirect troffers. These changes can be accompanied by visual appearance and visual comfort consequences, especially when LED lamps with clear lenses and narrow distributions are installed. Linear (T8) LED lamps with diffuse apertures exhibited wider beam angles, performed more similarly to fluorescent lamps, and received better ratings from observers. Guidance is provided on which luminaires are the best candidates for retrofitting with linear (T8) LED lamps.
- Publication Date:
- Research Org.:
- Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
- Sponsoring Org.:
- USDOE Office of Energy Efficiency and Renewable Energy (EERE), Building Technologies Office (EE-5B) (Solid-State Lighting)
- OSTI Identifier:
- 1221104
- Report Number(s):
- PNNL-SA-23366
6821
- Resource Type:
- Technical Report
- Country of Publication:
- United States
- Language:
- English
- Subject:
- caliper; ssl; eere; doe; led; lens; T8; lighting; troffer; report
Citation Formats
. CALiPER Report 21.2. Linear (T8) LED Lamp Performance in Five Types of Recessed Troffers. United States: N. p., 2014.
Web. doi:10.2172/1221104.
. CALiPER Report 21.2. Linear (T8) LED Lamp Performance in Five Types of Recessed Troffers. United States. https://doi.org/10.2172/1221104
. 2014.
"CALiPER Report 21.2. Linear (T8) LED Lamp Performance in Five Types of Recessed Troffers". United States. https://doi.org/10.2172/1221104. https://www.osti.gov/servlets/purl/1221104.
@article{osti_1221104,
title = {CALiPER Report 21.2. Linear (T8) LED Lamp Performance in Five Types of Recessed Troffers},
author = {},
abstractNote = {Although lensed troffers are numerous, there are many other types of optical systems as well. This report looks at the performance of three linear (T8) LED lamps—chosen primarily based on their luminous intensity distributions (narrow, medium, and wide beam angles)—as well as a benchmark fluorescent lamp in five different troffer types. Also included are the results of a subjective evaluation. Results show that linear (T8) LED lamps can improve luminaire efficiency in K12-lensed and parabolic-louvered troffers, effect little change in volumetric and high-performance diffuse-lensed type luminaires, but reduce efficiency in recessed indirect troffers. These changes can be accompanied by visual appearance and visual comfort consequences, especially when LED lamps with clear lenses and narrow distributions are installed. Linear (T8) LED lamps with diffuse apertures exhibited wider beam angles, performed more similarly to fluorescent lamps, and received better ratings from observers. Guidance is provided on which luminaires are the best candidates for retrofitting with linear (T8) LED lamps.},
doi = {10.2172/1221104},
url = {https://www.osti.gov/biblio/1221104},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Thu May 01 00:00:00 EDT 2014},
month = {Thu May 01 00:00:00 EDT 2014}
}