By "Plant Lights" I take it that you mean those Purple ones. Yeah, they're a bunch of crap - they suck! T-5 flouros tend to be a little on the expensive side for beginners, and they don't fit "regular" shoplight fixtures. If you're working on a budget stick with T-8 or T-12 tubes (whichever fit your fixture).
Whichever size you use, there are two things to remember:
1. Get the highest power rating that will work in your fixture.
2. Use the correct spectrum tubes (6,500 K for vegging - 2,700 K for flowering, or as close to those #'s as you can get).