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post #15 of (permalink) Old 02-08-2011, 05:40 PM
Algae Grower
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Join Date: Nov 2008
Location: Montreal
Posts: 31
you can get these buckpucks that have the added 10K pots, so no need for a ref voltage of 10volts :

these can drive the crees at 1000Ma, you can go for a lower current, its on the this page at the bottom:

LEDs die by being overcurrent and of course how many hours they are driven, since these have a MTBF of 50K hours you will grow old and gray before they crap out, so no worries if you did not dim them. Dimming only gives you latitude on intensity, and of course dusk to dawn effect.
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