Joshua
If I do a pendant I would hang from the ceiling that is for sure so i would have open top tank.

Jaded that is why I was looking at the eballast so that I could get the max life out of the bulb. I know that the magnetic ballast run bulb hotter and brighter but decrease the bulbs life very fast most are replacing at 6 months harder on the wallet then PC's and VHO's LOL.

The heat is also wht I was looking at T5 technology still need to vent the canopy there but not as much heat is produced as to MH lighting. I guess I would get more bang for the buck with MH light though.