I'm growing 2-3 plants in my basement in 5 gallon pales with DWC. I have the Lumatek 600 Watt Ballast http://www.progressive-growth.com/proddetail.php?prod=lumatek600-swtch, if I'm growing 1-3 plants should I just set it at 360 or 400 watts instead of 600? Or should I set it at 600, what would...