if the reflector has a glass or you place a piece of glass between the reflector and the cab, and the ballast will be outside the cab you should take care of most of your heat issues.
would really need to know the depth and width of the cab to even suggest what size light you should use the height is rather useless info.
bejay Reviewed by bejay on . NEEEEEED HID OPINION! Ok here is the deal.....below is a picture of my 3' tall cabinet and the 250w hps system i am considering buying...I have this idea where what i will do is cut a square in the top of the cabinet so that my HPS reflector can fit snug right over the hole....the ballast will be at the top of the closet on a shelf about 3 feet above the growbox....i have two fans 120mm computer fans already installed in the box one at the base of the plants and the other at the top of the box....not comming out the Rating: 5