okay so i have a slight problem. i just got 2 HID set-ups. they both came with a metal hallide bulb each, and they both work with the metal hallide. the ballast says that it can be used with HG, MH, and HPS which is great... but the only problem is that i need to use the hps option and i have no clue what bulb to get. i went and bought a 400 watt hps bulb from the store and it doesnt work in the fixture.... so i am guessing that i need a different type of 400 watt bulb. the ballast says it is a 450watt max, and a 400 watt mh bulb works great in it..... so i am confused and i hope somebody out there can tell me how to determine what bulb works with a ballast.
thanks everybody
thanks everybody