I recently found a 150 watt MH with 2x39 watt T-5s fixture to put on a 40 gallon breeder. One thing bugs me, it has no fan. The guy selling it said that as long as I don't put it in a canopy it doesn't need a fan, anyone agree/disagree? He also said that if I put it in a canopy I would need multiple fans. I plan on putting it on top of a glass top and that's it. Is this a good purchase for $200.