208 lumen per watt efficiency

DURHAM, N.C. - Cree, Inc. a market leader in LED lighting, announces another industry-best reported efficacy record of 208 lumens per watt for a white power LED. This R&D result passes a significant milestone within the solid-state lighting industry as well as demonstrates Cree's relentless drive to increase the performance of its LEDs. Cree's tests confirmed that the LED produced 208 lumens of light output and achieved 208 lumens per watt efficacy at a correlated color temperature of 4579 K. The tests were conducted under standard LED test conditions at a drive current of 350 mA at room temperature.
"We have now broken the elusive 200-lumen-per-watt efficacy barrier for a single white power LED," said John Edmond, Cree co-founder and director of advanced optoelectronics. "This is a result of improvements in blue optical output power, lower operating voltage and higher conversion efficiency. We continue to push the envelope in white LED technology to enable the highest efficiency white lighting products in the marketplace."
While this level of performance is not yet available in Cree's production LEDs, Cree continues to lead the industry with the broadest family of high-performance LEDs.

Wow that is sweet, I wonder how long it will be until we see flashlights with these in them!

At 4500k too, nice. Hopefully that can make it to a retail LED with at least 160 L/w at a decent current.

CKOD said:

At 4500k too, nice. Hopefully that can make it to a retail LED with at least 160 L/w at a decent current.

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It is cool to think of a 40 lumen light that only takes 70ma and you could get 5 lumens output using only 8.8ma current to the LED. Essentially a Q5 bin would be half as efficient as this LED. Too bad it could be 3 years to see them in easy to find quantities.

I want more details, like how large they made the die and what kind of package the LED might be in if and when they bring it to market.

copperfox said:

I want more details, like how large they made the die and what kind of package the LED might be in if and when they bring it to market.

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maybe this will give you a clue about their "timeline"
https://www.candlepowerforums.com/threads/213421
https://www.candlepowerforums.com/threads/122538

So... 2-3 years?

red02 said:

So... 2-3 years?

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probably more like 3-4 years, the 131 lumen declaration was over 4 years ago and we finally have 139 lumens/watt R5 bin LEDs now. Hopefully they can get stuff faster to the market though. After reading through that thread however their "claim was made using 20 ma for a reference which IMO is cheating because the declaration here is about a 1 watt drive level so I would guess it may have taken another year to reach 131 lumens in the lab at 350ma. Could be we see 200 lumens before the end of 2012, but I would guess more like 175 by then.

This is old news in the wrong forum. There is already a thread started on this in the proper forum.