hey i made a dresser into one but not as complex as a job u r doing i simply just took the drawers out and put flouros in on both sides and a 150 watt on top i wuz worrying the same thing if i put a hps or metal halide in there would it be too hot u can try getting one of the ballasts that exhausts thru a hole in the ballasts to keep the bulbs cool i would buy it but too low on money keep this thing posted it can help me out a lot and i'll let u kno if i find anything from my experiences as well im thinking of experimenting w/ a metal halide with mine soon