a heat problem

i have a 1000w hps in a 4/4/8 closet hanging bulb from the celing the door and walls get so hot they feel like they could catch on fire its my flowering room so light is only on for 12 hrs i have a 1000 cfm rotateable fan already how can i keep this from happening? please help

imo 1000W hps is overkill for a 4x4 closet, as for solutions... only thing i can think of is get like a 400W'er MAYBE 600W , but 1000W imo is too big

I'd like to get as most yeild possible i thought of bringing a fresh cold air intake out of my floor from under my trailer strait into the closet with a rotatable fan what ya think might work?