Y do I keep misspelling Darell?Originally Posted by EVnut
Apologies.
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Y do I keep misspelling Darell?
Apologies.
The world loves to be deceived.
No worries. It is very common to get it wrong... or right... depending on your angle. My mom had no intention of making the spelling of my name unique. She just didn't know how to spell it the common way, and put this on my birth certificate. I swear it was a quite unique spelling until maybe 20 years ago. And now various google searches turn up all kinds of "Darells." There was a time when I could use "darell" as my unique screen name EVERYWHERE. Those days are long gone.
Darell, the EVnut
Email me: darell at evnut dot com
How about your other brother Darryl?
Doh! First time I've heard that one! [shakes head]How about your other brother Darryl?
Darell, the EVnut
Email me: darell at evnut dot com
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.
Darell, the EVnut
Email me: darell at evnut dot com
These new multicolor chips are also very neat:
LEDs Magazine - Cree announces Red-Green-Blue-White multichip LED, XLamp(r) Color LED performance breakthrough
Adjust your color temp to suit!
What's the theoretical maximum lumens per watt?
Also, can you elaborate on your second paragraph?
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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