I am working with a closet that is 2'x5' and 8' tall, so the biggest sqare area i can start with is 2'x2'. I have ordered a 250watt HPS system, 25' of mylar sheeting, and intend to use 4 1' pots with 2 plants per pot. One oscillating fan to provide circulation, and it is open to the rest of the house during vegitative cycles. With floro's, the average daytime temp. is 78-80. If this increases too much with the HPS, I may add an exhaust system. Anybody see any problems with this? Comments would be appreciated.