questions from noob

Hey guys I have decided to go 400watt mh/hps grow light for my closet do you think this is too much for a closet? I am concerned about heat build up.I will probably use a big ass fan to circulate the air and get a air purifier too.Any other suggestions? thanks guys

I'm sure the suggestion that will come to you is to exhaust the closet and keep the air circulating..

Nice avatar btw

How big is your closet?