400w HPS Cab Grow

I'm nervous to order lights and purchase my cab until i hear some experiences. Im planning on putting a 400 watt Hps in a 4' W x 6' T x 22'' D cabinet. I'm worried about the heat. anyone doing this now, any experiences or knowledge as to what i would need to do to keep temps optimal?? Any help is greatly appreciate it.

It depends on wether or not the door is going to be open during lights on. I have a similar size closet and have some problems with the hid light with doors open, and no problems with hps with doors open. Keep in mind that i have a 12" oscilating fan on high for hid and low for hps as well. If the door has to stay closed i would reccomend buying 2 inline duct fans and placing 1 at the top by the light and one lower in the closet for ventilation. I guess it all depends on wether this is a stealth grow or not. with more imformation i could give more advise.