Join Date: Mar 2004
Location: S.F. Bay Area, CA, USA
Yes, I was just thinking that you may be over-working 10W PC bulbs if the fixture is meant to take two 25W incandescents. It may actually be safer to use the 20W, although that's a LOT for a 5.5-gallon... You'd be headed straight for serious algae problems unless you really know what you're getting yourself into and can balance out everything else accordingly.
If you can come up with about $35 to blow, you can get a Coralife Mini Aqualight, which is only 9" in length and holds two 9W PC lights. It's meant to sit on a glass top, which you can have custom-cut for just a few bucks. I've heard some really good things about this light, and I'd think that it would be perfect for a 5.5-gallon tank. But I guess if you have a decent, working hood already, you might as well try out the compact bulbs. Two of them might cost almost as much as the Aqualight, though... The bulbs are pretty expensive. Definitely shop around for prices if you're on a tight budget.