Hmm, ok, a 1K, huh? Yes, there's gonna be a lot of heat. BTW, no the closet is certainly not too small although it may turn out to be kinda small for that big a light, but not for plants. I would guess the attic would be best, if you can get away with some fairly big holes through the ceiling of the closet...hot air rises, so that's the way it's going to want to go anyway. Can you get enough intake air? Are you going to use the attic air for intake, and if so is it going to be a winter thing? I don't think you would get cool enough air from the attic in the summer, but that depends on where you live. I wondered about that light size when you said it had 9" ducts on it....LOL...The problem is gonna be to get the temps, even with fans, down to reasonable growing temps, that small a closet may be like a little wind tunnel, but then weak stalks and stems won't be a problem, will they? One things for sure, the babies won't lack for light! There's one sure way to see if it can be done, and that's to do it....or as Yoda said..."No try, only do!"

crap, did I really just quote Starwars? I must be blazed..... :stoned: