I'm just starting to grow indoors again (had a mini lemon tree... it made a good margarita). Anyway, flourescent lighting is usually recommended 1/2 and 1/2 for flowering/fruiting plants. Basically, if you use a 4 parallel tube system (which you kind of need for any plant), you would put 2 "plant"
bulbs in and 2 soft white tubes. And since they're flourescent they need to stay about 6-8"" from the plants.
My advice... make friends with people in the construction industry that redo office buildings... they always just throw their light fixtures out, so just rewire them to plug in an outlet. You can get a $60 fixture for free. Inside your little tent, you'd probably need about 4 for the four fixture flourescents (16 total tubes) for tomatoes... they're little buggers that love sun.