I was thinking. If i take an air duct, and make slits in it, and extend it the entire length of the area, (similar to the concept of an air conditioner), would that work? in other words, have a hole where a duct comes in on the bottom of one chaimber, then the duct goes to both chaimbers on teh bottom, then take a knife and make holes in the ductwork. That way air can get into both sides, and minimal (if any) light issues. I suppose the same would work on the outgoing air holes as well....except with two fans on top (one on each side, pulling air out both ends).