Quote Originally Posted by J DOG 6000
It creates unnessisary heat.

Alot of unnessisary heat for sure! I have 3 of my ballast up in the attic sitting on steel trays ontop of fire proof fibre glass this also takes away the somewhat loud humming noises from the Ballast!................When I first started growing I had the ballast in the same room with my plants and let me tell ya it got really warm in there with the ballast and the bulb of course.....but the ballast heat could heat up your grow room really fast exspecially a none vented 4x6 grow room!