Look
The efficacy of LEDs should read 10 -186
http://en.wikipedia.org/wiki/Luminous_efficacy#Examples
and the reference is here
http://www.cree.com/press/press_detail.asp?i=1259701233981
please
The efficacy of LEDs should read 10 -186
http://en.wikipedia.org/wiki/Luminous_efficacy#Examples
and the reference is here
http://www.cree.com/press/press_detail.asp?i=1259701233981
please
