SativaMe@420
Well-Known Member
If you have a magnetic HPS ballast then your only choices are: HPS, MH conversion & Ceramic Metal Halide, out of these options the CMH is IMHO the best, here is a 150W Philips Mastercolor CMH for $34, a little pricy but TOTALLY WORTH IT!!! Especially if you supplement HPS or red LED's with it. If you do go CMH be sure to get Philips MasterColor and not a GE or some other crap CMH, Philips are the best.how about a ceramic MH bulb? pricey but look good and made for HPS ballasts as long as its not digital.
http://www.growlightexpress.com/pages/ceramic-metal-halide-pv-c0-2.html