[shorod]

As far as I'm aware, part of what makes the system a true High Intensity Discharge system is the high voltage for the bulbs. You won't get that high voltage without a ballast.

If all you're end goal is is to have the "look" of HID bulbs, you can get halogen bulbs tinted to give the blue or bright white color temperature of HID, but you won't get the full lumens of real HID.

-Rod