Cree High-Power LED Tests Achieve High Efficacy Rating

September 16, 2007 by Jeff Shepard

Cree, Inc. announced it has achieved R&D results of 129 lumens per watt for a cool-white LED and 99 lumens per watt for a warm-white LED. According to the company, these are the best results reported for packaged, high-power LEDs, and they clearly indicate that Cree is extending its position in solid-state lighting through its continued investments in LED technology.

The results have been verified by the National Institute of Standards and Technology (NIST). NIST’s tests confirmed that the cool-white (5,813 K) LED produced 135.7 lumens of light output and achieved 129 lumens per watt efficacy. The warm-white (2,950 K) LED produced 104.2 lumens of light output and achieved 99 lumens per watt efficacy. The institute tests LEDs at 350mA and measures the output after five minutes of operation to ensure thermal stabilization.

According to the company, in coming years, such investments in core LED technology could lead to products that replace traditional light sources in all commercial applications. Customers may see these technology advancements in commercial products within 12 to 24 months.

"To replace traditional light sources, LEDs need to provide both high light output and high efficacy," comments John Edmond, Cree co-founder and Director of Advanced Optoelectronics. "Cree continues to push the limits of LED performance in order to realize the potential of the LED lighting revolution – energy-efficient, long-lasting LED light."