You need a ballast and any HID bulb.
growbe Reviewed by growbe on . MH lighting question I plan on doing a CFL grow but have a 70w MH that I got for free. It is a medium base so it can screw into a normal light bulb socket but from what I see MH and HPS bulbs need a ballast. I plan on getting some of the all weather sockets (the ones that can plug into a regular outlet) and making a reflector hood for them. I'm wondering since the MH bulb has a regular base, can I plug it into a regular socket or do I still need some sort of ballast? I'm assuming it would work, but would it be Rating: 5