Hell ya man. Are you replacing watt for watt? Or close so 3 315w, 945w per 1000?
First grow and jumped in with a 315 in a 3x3. Temp inside litterally runs 3 degrees warmer then the room(closet) it's sitting in. With the 6in fan set to low. I think 206cfm. I can put my hand on top of the hood...