As i returned from Rush hour 3 today, i check on the plants, it is pretty warm in there now, the light has been on for about 22 hours, and the heat isnt too bad, its high, but it will never be on for that long ever again, but i am probably gonna add a fan to the set up. I am doing a Scrogging method as well, hope to get plenty busy buds. now as in terms of fans. do i need them for the ventalation of the entire box, fresh air in, bad air out, or we just trying to get the air that is in there, moved around a bit. which would be more effective?.