The heat is some killer aint it.? I live in a mobile home and at the hottest part of the day it would be around 30'c. I grow in a small press (16"x21"x6ft) with 250w hps, i used to have terrible problems with heat, even on a normal day. I did alot of research and came across a great solution. Unfortunitly no link. I'll give you a quick run through. I have 1 12cm pc fan for extacion, and 2 12cm pc fans blowing on the plant. I dont have an intake fan because it accually made it to cold. With the door closed i can get the hps 8inches away from the top of the plant. Could probably go closer but dobt wanna risk it. Now before i couldnt get the hps close than 18inch. To accomplish this all i have done is get a very thin peice of glass, i used a cheap picture frame. I cut it a few inches shorter than then length of the press, this allows the air below the glass to vent upwards and out. Clean the glass well, and dont touch it with bear fingers, even accidentlly, it will leave grease on the glass and when it heats up it shatters. Now i havent put a thermometer under the glass, but i can put my hand directlly under the glass and it completly cool. I dont know what set ups yer using but it mite be usefull to someone. Sorry if there spelling mistakes and that, im writing this on my phone.