let the air in from a vent on the roof where no light can escape, one vent for in, one vent for out. and you really only need one actual ventfan, I would suggest at least 250+CFM. I would put that ventfan to pull air from the room through the light and out to the top of the room. the other vent in the roof would have a 4" dryer hose attached to go to the bottom of the plants. (since heat rises.)

or I could just be really stoned.:stoned: just hooked up a 32"HDflatscreen to my PC. and likewoah.