I'm with meowzer on this one.
I have one of the cool breeze clip on personal fans blowing upward on my halide.(like 7 bucks) My tank stays at a rock solid 78. I have a 175 watt halide with two VHO actinics over a 29 gallon bio cube. No glass either since I run a single ended bulb. My fan is about 2 feet away from the light fixture and tank. Runs 24/7. My bulbs are 7" off the water. I can touch and hold on to the base that the halide screws into.