Sorry not to answer anyone that was kinda rude I guess I lost this post in all the other ones, I have a fan on the top to pull out the air and the fans on the sides pull air into the box. The light isnt in there yet. I did set something in there to light the box up but this is not the light I will be putting in there. I think I will be using a 150 watt mh & hps, or I might put my t5 in there for vegging. im just not sure.