I have been growing in a similar space with CFL. I am getting a decent return, but am thinking of switching to a 400W HID for the next grow. Don't get me wrong, the CFL's do a great job if you have 1 or 2 plants, and a little space. If you want more weight, I would go with the 400w. If you decide to stick with the CFL, I would check out a few of the grow shops....since they have some that are much better than the ones you can get at the grocery store.