That"ll work. But I'd grab a 600 watt, aint much difference in price and you will get some huge buds. If you went with a digi ballast it would use just about the same amount of juice as a 400 watter with standard ballast. Remember the goal is 50 watts per sq. ft. to grow em the size of your forearm:rasta:

Just 'member, with HID lighting comes heat, and lots of it. Make sure ya got a plan to deal with it so you dont cook yer plants to medium well.


b0nger