I here u there, the CMH r unbelievable my next purchase will be the 630 CMH of some description, what size is your flower room, mine is only 1.2meters x 1.2 meters at the moment, in 4 months I will b running more lights in my big room will b scrogging 5 meters square, 6 plants is the plan, here I can get a 315w CMH with ballast and adjustable shade for under $550 Australian. I picked the 600 w cultiv8 with shade and adjustable ballast, brand new for $140 Australian, a guy had an investment property and busted the tenants starting a grow, they owed him rent so he took the gear in leu. But yeah, those CMH r great for the power bill. Peace.
Nuggets