I keep 4 moms in a 4'x2'x5' under a 250 watt MH and they grow vigorously. HTGSupply's $117 250watt Magnetic ballast grow setup with reflector, socket, cord and bulb. I upgraded the bulb and keep their bulb for a spare. T5's work well I've heard but I've never used them. CFL's will work. If your...