Also depends on the system to. Seeing as how the bulb doesn't "ignite" when first tunred on but gives a big of a flicker when it is on. Have you tried turning it on and leaving it on to wait for the bulb to warm up. Some ballasts require this sorta thing to take place before it it fully funtional.

Is the ballast new? Used? What kind? Model #?
pudder Reviewed by pudder on . BALLAST BAFFLED! Can anyone please give me some input on what may be wrong with my ballast. I got an hps 600 watt lighting system. When i put the MH conversion bulb in my system it lights right up and works fine, but when i switch to my hps bulb, I get a low flickering glow but it wont light up, it lit up only once or twice before but after i kept plugging and unplugging the plug and after that it never lit up again. I thought maybe it was the bulb itself so i went and bought another one, and i made the guy Rating: 5