temp in grow cab

What is the best temp in a grow cab to grow an auto im at 80 deg at plant height they are about 6 in tall im going to switch to a hps when they start to flower am using cfls during veg

I try and stay just under 80, you don't mention what form of cooling your using. what is your current light cycle time? My room is set up with a small intake fan , located at ground level and I run it to help bring cool air in, when temps get above 76, then exhaust