Well, one possible advantage.... the hex tank has a built in "cover" with a couple openings, the biggest being 17 x 7", where the light fixture that comes with it sits. So, if I can find a fixture (maybe with legs??) to sit on top then it should work. Ive seen some with 2 - 65W bulbs. Is it possible to get by with this? At least it is better than the 30W that I have now.