Even if the hood is enclosed,you'll need good ventilation. I see a use for the smaller fan now. You should have flex from outside the tent,running to one end of your light and the other end to the fan exiting the tent.Hang the smaller active air fan inside the tent and open a flap on the bottom of the tent for a passive flow. Exhaust the small fan outside the tent as well... You'll have your ventilation working like it should without collapsing your tent,or sucking the sides in..