I've got 2 - 150s in my box, plus a couple of cfls. I've got the smallest bathroom fan I could find ( I think it's like 80cfm) from home dePOT, and even then in colder months I can throttle it back to half.
I've got the lamps in DIY cooled hoods. I can put glass in, but usually don't.
Regardless, I find my plants do better when the bulbs are at least 8" away. They don't seem to like to be too close, even though by my hand it's not too hot.