Sorry I overlooked the part about number of plants earlier :stoned:

With that space and budget, get a few more CFL's. In the El Cheapo Guide link I posted earlier, there are pictures of Y socket splitters a few posts down. You can get those at Home Depot or Lowes, then you won't need more sockets. I saw in another post that you can get 4-packs of 23w CFL's for $12 at Lowe's if I remember correctly. For that area aim for at least 20,000 lumens total. The more the better, but then you will have to look into getting rid of the extra heat.

You may also want to look into LST or Scrog for your cab. 4 ft. is not that much in the end. Of course this will also depend on how long you plan to veg and if the strain is indica or sativa.

Hope this helps And really read down that link earlier, there are some great tips after the first post like connecting 3 socket splitters to attach 4 lights to one socket.

Happy growing :jointsmile: