Sorry, but a 250w hps in that small of an area is going to be WAY too hott! If you add a couple of cfls you got yourself an oven. Thats a samll enough area that a few cfl's in the right light spectrum will do the job. Let me clearify that, it will do the job as in make buds, but the chances are they wont be the most dense of buds. Good Luck