Well I've almost always done LEDs and that's why i recommended the finnex Fugeray as its very efficient and effective at low light planted aquariums. However, I've seen numerous hobbyists here use full spectrum daylight CFL's (compact florescent lights) in standard lightbulb (incandescent) hoods/sockets to save money.
You just have to look for CFL's that say "full spectrum" and "daylight" on the box. The light temperature is usually between 6500K to 10,000K. I believe they're about 13 to 18w?
Sorry I'm not an expert using this type of lighting on aquariums. I just seen others use it. You might want to research it, use the search function on this forum, and/or google it...unless someone chimes in here. Good luck!