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post #10 of (permalink) Old 12-04-2012, 04:10 PM Thread Starter
Algae Grower
Join Date: Sep 2012
Location: Western Philly Suburb
Posts: 33

Virtually no heat from the LED. That's the driving force for many people (particularly in the marine aquaria world). LED or light emitting diodes are generally adhered to an aluminum heat sink. basically it's an aluminum block with "fins" or slots cut into it. the surface area of the aluminum absorbs the head emitted from the LED and transfers it behind the fixture instead of like all other light sources directly toward the water's surface...
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