I've had a lot of success with normal fluorescent shop lights, here's some from Home Depot:
http://www.homedepot.com/webapp/wcs/stores/servlet/Search?keyword=shop+light&langId=-1&storeId=10051&catalogId=10053
I do my work in the basement so I just have them connected with metal chains to the studs in the ceiling. It was really cheap to set up and since I have a hook on the end of the chains I can easily raise and lower them as the plants grow. I agree with Sharon that having an expensive setup doesn't make sense for starting out. Do something cheap and then in a few years see if you need something more.