First Indoor - Choosing Lights (Help!)

Look at me..just finished up with my first harvest and i'm starting another. A good friend of mine has just informed me that he has a closet to grow in. It is a nice size and he already has a streched sprout in there going on 1 CFL.

We want to get some money together and get some more flourescent lighting for the plants we will have. I originally told him that we should get a bunch of CFL's, but we decided that we want to get the longer tubes that hang in a fixture. (Since we have the room, im figuring its more wattage per $?)

I need opinions about indoor lighting as far as most affordable and effective way of getting good light? lookin for best bang for the buck is what im gettin at

THanks

How many plants are you lookin at growin? From what I've read, the long tube fluorescents spread out the lumens, whereas the same wattage CFL can be directed straight onto the plant.

My grow journal has pics of how I did it with CFLs. Didn't cost me much money and my plant turned out nice so far. The CFLs don't produce much heat, so it's nice for my non-vented closet.
Hope it helps. Happy growing.