Planted Tank Guru
Join Date: Jun 2004
Location: Baton Rouge, LA
Two T8's will give you low light, and that's what I run on my 25G.
If you have a glass cover on that 25G, and you have some 10G incandescent fixtures (or can scavenge them up inexpensively), you could also place one or two on the cover. Use 6,500K (daylight) spiral CFLs of any wattage you want in them. Ain't pretty, but you can really play around with your lighting levels that way, on the cheap.