thats a large area, are you sure you wouldnt rather just get a 400 or 600w hps? i got a 400w setup from ebay that included everything- digital ballast, reflector, hps and mh bulbs, timer, hangers and all that nonsense for only 140 shipped... theyre on there all the time. its much easier to only have 1 light to deal with then a whole bunch of cfls trust me! cfls work fine dont get me wrong, but with that big of an area you could grow a lot of plants, and to grow a lot of plants you would need a TON of cfls, or 1 hid.