Hello all, I am looking for a digital ballast. I would like to be able to select between 600 and 400 watts Why do so many companies make the selectable wattage at 600, 450, and 300 watts (100%, 75%, and 50%), Wouldn't it make more sense to match the watts to the bulbs available? I want to run 400 watt MH bulbs to veg, and 600 watt HPS to flower. I was hoping there was something available that was somewhat affordable too =)