On Mar 11, 2008, at 7:42 PM, David VanHorn wrote:

>> I thought semiconductor lasers were VERY inefficient compared to
>> todays LEDs, in terms of the overall amount of power emitted as  
>> light.
>
> Well, that's part of what I'm looking to find out.

Hmm.  Just as a reality check, there is Sharps GH04P21A2G blue laser  
diode that emits 105mW at 5.4V, 120mA; about 16% efficient, while a  
royal blue luxeon 3 is rated 450mW at 3.9V, 1A or 12% efficient.  I'd  
call that comparable and say it throws my original statement out the  
window...

BillW

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