I would love to try CMH bulbs but find every 315w set up cost's around $500 to run. Searching around I found this 400w CMH complete kit on HTG for $170. I know there a very well known and trusted company but is this to good to be true or is there just a big difference between HTG's CMH set up and Sunsystems CMH (besides the internal ballast)
http://www.htgsupply.com/products/htg-supply-400w-ceramic-metal-halide-grow-light
http://www.htgsupply.com/products/htg-supply-400w-ceramic-metal-halide-grow-light