CAligrown, you must be mistaken or need to work on your ventilation. I use the 4' x4' Hydro Hut equipped with a 1000 HPS cooled by a 6" vortex. I see the temp rise only about 5 degrees farenheight. I keep the 1k hps no more than about 12 inches from the tops of the plant (usually 10-12 inches). That is not on a light rail. For these H.H., you must, (or probably should) run an air cooled hood. I plan on getting another one and putting 2 600w HPS in there. All you have to do is work out the vent.

I wish i have the capital to get one of those HH Delux (4x8). Then i'd be alright,