Cooling my homemade reflector

Ive decided to create a reflector designed to hold 12 26 volt cfls out of a very sturdy box. It is 19" long by 13" wide and about 6" tall (I haven't measured the heigth). I'm putting two power strips in a straight line along each side of the box. Four power strips total. Each one will hold 3 bulbs, mounted horizontally. This gives me 12 bulbs in less than 2 sq feet and should be plenty of light for my small grow. I'm lining the box with either aluminum or styrofoam, haven't decided yet, to reflect and capture more light. My problem lies in ventilating my new hood. I have some 12v pc case fans wired to some old phone chargers, and im debating on where to place them. Would it be better to place them both on top of the hood, centered and together. On top but apart. Or on one of the short sides blowing out. Or one on each side, one bringing air in and one out. I have four fans total, but was planning on only using two. Anyone have an idea of what would cool this unit most effectively? Or could someone explain to me how air moves, so I could better understand the path it travels in the hood and the best way to vent it out. I'm sorry for rambling, Ideas and discussion appreciated. I want this done right the first time.

Either one way would help. If you plan on running exhaust lines from the fans then I'd say which ever way is easiest for those exhaust lines to run. Of course heat travels up, but thats not necessarily going to be the BEST placement for YOUR grow.

Maybe try this since you have multiple PC fans (and since there only PC fans and not an inline). Have one pulling air in, then another pulling it out. May be an overkill but an idea. But to me, I'd run just one pulling the air out for now then if the heat it still bad add the other.