I'd say you're gonna want more if you can. It would probably be ok for veg stage, but (assuming your sticking with flouros & cfls the whole way through) you're gonna want more for flowering stage. Maybe two of the 4 ft'ers across the top and one cfl for each plant. It would double what you have there, but you'll probably get better growth and a better harvest in the end.

And this is just my speculation, I'm learning at this point and not very knowledgeable so I would say get the opinion of a well experienced grower around here. I'll try to look around and see what would be good for your set up so hang in there. And definately take the advice of experienced growers over mine.

Oh, and the picture. Trust me, get to know ms paint a little (it's not hard at all) and it will be your best friend when trying to draw simple diagrams.

edit: oh, before I forget, if you didn't know already, try and use mylar around your walls or paint them flat white, it might also help to build a reflector around the lights.
AR15 Reviewed by AR15 on . enough light still new to the scene. but starting with four plants. Using one four foot fluorescent light and four 26watt cfl. will this be enough for there whole life? Rating: 5