I would take the ballast out if i were and mount it out side the grow room, but if not a little computer fan might help
simplesimon Reviewed by simplesimon on . Power supply question (400 hps) Does the power supply need cooling? It's pretty hot, is this ok? It's mounted at the top shelf of my cab,so there is no real active venting on it. Just wondering if it is generally designed to take the heat that it produces. Digital ballast if that makes a difference. Thanks! Rating: 5