I’ve run just about every kind of light at this point. Cheap LED’s, cheap COB’s, CMH, HID and now Quantum boards, always searching for the holy grail of grow lights. They pretty much all grow good bud, it’s just a matter of how many you need and how many watts your using. If your lights work for your space and you’re comfortable with the monthly bill, I see no reason to switch. Personally I’m on a quest to grow as much high quality weed as I can for the lowest possible hit to my wallet both now and on a monthly basis. This far HID has been the best balance of cost and quality. I’m sure if I had spent more money on a higher quality CMH fixture it would have been equal if not better. Like most fixtures you get what you pay for with CMH fixtures and bulbs. If it ain’t broke don’t fix it unless you think you can make it better!!