I have somethign similer to what you have. I got a 6 foot tall wood cabnit from home depot. I put the 400W hps at the top with a reflector. No cool tube nothing. I have 2 fans moving hot air out. One is to the left of the light and is a 6in fan. It pulls alot of air. The other is on the cieling and is just one of those little crappy fans. Anyway i cool the unit with A Ac wall unit (99$ walmart) i put it in the side in the middle. It works for me ive gotten some good dank out of it.
Magoo2003 Reviewed by Magoo2003 on . light and ventilation setup, is it safe? Im doing a cabinet grow this time around, and that means I need to get a smaller light and worry about ventilation. My cabinet has a shelf on top that I was thinking of hooking to chains (it has screws underneath but id rather be safe) so its adjustable. What I was thinking about doing, instead of buying or building a nice air cooled reflector for a 250/400w hps, is cutting a hole in the board for the light to shine through, put a peice of lexan glass over the hole (keep heat out) and then Rating: 5