4 February 2010


Cree breaks 200lm/W efficacy barrier in R&D for white high-power LED

After reporting efficacy of 186 lumens per watt (and 197 lumens output) only in early December, LED chip, lamp and lighting fixture maker Cree Inc of Durham, NC, USA has claimed another luminous efficacy record of 208 lumens per watt for a white power LED. While this level of performance is not yet available in Cree’s production LEDs, the firm says that the R&D result passes a significant milestone within the solid-state lighting industry.

Cree’s tests — conducted under standard LED test conditions at a drive current of 350mA at room temperature — confirmed that the LED produced 208 lumens of light output and achieved 208 lumens per watt efficacy at a correlated color temperature of 4579K.

“We have now broken the elusive 200lm/W efficacy barrier for a single white power LED,” says John Edmond, Cree co-founder & director of advanced optoelectronics. “This is a result of improvements in blue optical output power, lower operating voltage and higher conversion efficiency,” he adds. “We continue to push the envelope in white LED technology to enable the highest efficiency white lighting products in the marketplace,” he claims.

See related item:

Cree claims record 186lm/W efficiency from high-power white LED

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