This Gateway demonstration report provides an overview of project results including lighting performance, economic performance, and potential energy savings.
Key findings include:
• All three LED products drew less power than their fluorescent counterparts but also provided significantly fewer lumens on the room and work surface grids measured beneath and beside them.
• The prices of the LED products are such that none pay for themselves when compared to the standard T8 fluorescent lamp used as the primary baseline in this study.
• If lower light levels are acceptable, similar energy savings can be achieved much more cheaply by substituting lower-wattage fluorescent lamps. Such lamps also have very long lifetimes (30K+ hours) and better lumen maintenance than the LEDs over their lifetime.
Alternative designs, such as panel-type products and overall troffer replacement systems, may prove more effective in the future than the products tested in this study. None of these alternative whole-luminaire designs were evaluated here, as this study focused exclusively on products designed for direct replacement of fluorescent lamps in existing troffers.
The report is available for download at http://apps1.eere.energy.gov/buildings/publications/pdfs/ssl/gateway_t8-replacement.pdf. This lighting demonstration is one of many DOE Gateway demonstrations that showcase high-performance LED products for general illumination.
To learn more about the DOE GATEWAY demonstration program, visit www.ssl.energy.gov/gatewaydemos.html.