How about your other brother Darryl?
The world loves to be deceived.
Last edited by TEG; 05-01-2009 at 12:17 PM.
132 Lumens per watt?! Crazy... and awesome.
Now we can start under-driving these things significantly to take advantage of one of the best features of LEDs - the astonishing efficiency gains with lower current.
In many applications one wants to drive an LED at the max current it can handle because you basically want "max lumens per emitter" which isn't the most efficient way to drive it. If you are willing and able to accept less light output then you can give it less current and you get more lumens per watt out of it then you would driving it harder.
In flashlight applications, for instance, you can reduce light output and get much longer battery life.
He was pointing out that you could get more lumens per watt if you were not trying to get as many lumens out of an individual device.
If you can afford the space and cost of more LEDs then you are better off "under-driving" an array of them.
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