Ok so the dual t-5 HO
lights look cool, but at $90, I have to just say no [moderator edit] way. Are there any 20" dual t-8 fixtures around. 30watts would do fine to grow plants in a little 10 gallon, 20x10x12 aquarium.
I've been thinking about buying an incandecent style hood, then loading it with two screw in type CFL's designed for atriums. That should give me decent spectrum and plenty of power, 26 watts per bulb on the ones I've seen.