I use a home made setup with 2 CFL's 15W for my 36 gallon corner. Everything is going well. I salted the tank a bit and the Cabomba didnt like it, but not the lights fault!
If you have the space on the top of the tank go to HD/Lowes and get 2 of the Chromed tin "clamp lights" take the clamps off and set them right on. Easiest, most reliable lighting you will ever get away with.
Make sure to use high spectrum lights, typically CFL's are all pretty "daylight" anyhow