Temp Problem, Please Help!!

Its not long, it just looks long, please please please read. I really really need help. OK, so i had 2 1000w HPS in a 4x8x8 room. They just had the regular old metal "wing" reflectors on them. We had fans on either side blowing at the lights then 2 box fans just blowing air. No exhuast or intake...we were just testing to see. Anyways, in a matter of minutes the temp was up to 110 and rising every second. We decided we only needed 1 light. But my QUESTION IS...those reflectors that you put a exhaust and duct work and all that on there...about how much would that drop the temp? That sucks all the heat away from the light before it even gets into the room right? Someone please help, i need to drop the temp alot and quick. Has anyone had this problem with that reflector then switched to a vented reflector and how much did it cool off. Short of adding a AC unit in the wall how else can i get rid of that heat. And if i do need an AC unit how big do i need for a 4x8x8...a 5000btu. Please help me out.

for some reason it seems if you were saying that all in one breath....