You're gonna love the Cooltubes. A lot of us used them for HIDs, before we switched to LEDs.

My wife wants me to sell mine (2@1000 watts), but I'm not gonna.  lol  I'm emotionally attached to them, we grew some great weed together.

Hook a good 6 inch fan, to the input side of the light, and you'll be able to touch the glass while they're on.