The other thing to consider is weight. Using fans lets you use smaller heatsinks. I have big heatsinks in my unit that probably would have done the job without fans and the bloody fixture weights at least 50 pounds. That is heavy. If I could have found thinner or lighter heatsinks in my price range I would have gone with them.
As you say, LEDs generate less heat than a CPU but you don't have 80 CPUs on one heatsink either. Either way, if you want to run the LEDs with higher current (more output) and keep the size and weight reasonable then fans are likely necessary. if you look at the units without fans they are either using 1 watt LEDs or driving 3 watt LEDs at closer to 1 watt to minimize heat.
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04-20-2010, 08:34 PM
Hybrid Mode
