goldtech:Cree claims white LED record

Cree has reported measuring 231 lm/W efficacy in the lab from a single die 4,500K white LED with 350mA at room temperature.

"It wasn't long ago when 200 lm/W was considered the theoretical maximum efficiency for an LED. We broke that barrier in 2010, and have now achieved 231 lm/W," said Cree co-founder John Edmond.

The device is said to "features advanced aspects of the same technology used in XLamp white LEDs", and the firm clarified: "this level of performance is not yet available in Cree's production LEDs".

No more information has been released