grow tent or no??

basically i have a spare bedroom that has a/c running to it...i can use an area of about 7x7 in said room...i like all aspects of getting a homebox, the only thing i worry about is the temps getting to high running a 600 hps...what do you guys think??

I would get a Darkroom tent, and an air cooled reflector. Intake cool air from near the AC vent, and exhaust it out of the window.

should i get a cool tube?? so have a fan pulling the a/c air into the tent, through the light and right out the tent?

Yes that would work, of course I would try pulling cold air in from the AC, to the tent, and also try pulling it from the ac through the tube and out.