I've used those industrial four bulb fixtures before. I had one on my 55g reef. It overhung the edge front to back by a little bit but it fit just about perfectly. I hung it from the ceiling at first but eventually mounted it into a canopy. It comes with cheapo magnetic ballasts, but they work. Go with Gro-Lux bulbs from Lowe's and your plants will be very happy.
Just make sure and ask him to plug it in and test it in front of you before you walk out.
- Sam P -
plantedtanker in limbo - all tanks currently in storage