venting isnt a problem.... i wish i had a camera so i could photograph my closet but several expierienced people have looked at it and were amazed by it its a pretty sweet little set up, i have ventalation the humidity never goes above 30% and the heat never above 80F and i have all the walls painted white. Thanks for the input as always its greatly appreciated and i think im gonna go with the 400 HPS then:jointsmile: