Quote Originally Posted by dagarden4me
I just have my fan exhausting straight from the hood I built through some duct work but I could cut a whole outside my box connect it through the cooltube and connect my fan to the other end of that is what your saying and it will just pull the cool air from outside the room through the light and out the top correct?
I'm not sure I understand you. Also you keep saying hood but you don't ever mention if it's completely enclosed or not.

A Cooltube is a type of hood/reflector that is completely inclosed in a round tube so that you can hook ducting on both sides of it to vent all the hot air out of your room.

I've attached a rough diagram of how the lay out would look.