Way too hot

My growing room is way too hot and im trying to figure out a way to ventilate it. I just went into the attic above it and its basically unreachable to put a fan above it to suck out the hot air. Does anyone have any ideas on how to ventilate it? The room is the closet in my bathroom its about 5x4.5x9.5

Would i be better off putting it in a cabinet and installing a fan on that and then sticking it in the closet? Im using a 600 watt hps

cool tube to the attic, you can make one from supplys at home depot for pretty cheap, just cut out holes to the attic and one from a cooler place for the supply

damn a 600W... arite well i was in the same boat with making a makeshift grow room, so here's what i did/do

when i'm home i leave one of the closet doors open to allow cooler air to be sucked in by a fan i sat on the floor. recently i had to up the security of my closet (i.e. lightproof it) so i had to drape black sheets in there to isolate light, it also increased heat like crazy, so i got a second fan and bolted it to the wall of my closet (just hanging off a screw) and that fan pulls air upwards and away from the light/plants... now suprisingly my temps are just below 80! i attached a pic for you to get the idea.

btw my setup makes a nice air circulation, even when the closet door is closed, the hot air is forced up and over the sheeting, and as it falls and cools the lower fan throws it back in

thanks runagi im going to try that and hopefully it will help