The evolution of solid-state lighting continues to advance with improved performance, including better light output and lower variability, according to the U.S. Department of Energy's program for testing and evaluating light-emitting diode (LED) lighting systems. Round 13 of the Commercially Available Light-Emitting Diode Product Evaluation and Reporting (CALiPER) Program looked specifically at LED high-bay, wallpack and two-foot by two-foot LED troffer luminaires. “On average, the Round ...

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