Quote:
Originally Posted by theatrus
At ~700mA for all channels (with dimming it would be less) and assuming 30% efficient emitters we are at about a conservative 65W that this needs to sink away. Most of the emitters are better than that (low 40%). The thermal resistance from package to heat sink is an unknown at this point, so I don't have a good estimate on die temperatures.
Forced air is required, but probably not much.
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Its a little off topic, but I'm curious to know how you figured out the efficiency of the emitters.