Are we talking hps or hid? The picture on my name is a 4.5' x 6' with a 600hps in a 4.5'x12' walk-in closet. It throws a lot of heat. I couldn't imagine using a 1,000w. The 20" box fan I use is a must but it can still hit 88f in there. I run the light from 6pm to 6am. Running at night helps with...