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My cabs dimensions are 20.5 x 70 x 48. Will a 200cfm fan like this one be enough extract the heat of a 600watt hps light?
I will also have a powerful fan blowing directly on the bulb to keep it cool.
http://www.homedepot.com/cmc_upload/...3e80253d45.pdf
Damn thats pretty good I'm going to buy one of those fans ASAP. A good friend said "turtle420" that for evey 100watts you need 40cfms. So for a 600w light you would need 240cfms but you said you also have a powerfun fan blowing directly on the bulb so it should work