The lighting was poor on my 98 Chevy Van so I installed Silverstar high beam bulbs and an HID low beam system. The reason for not going with Silverstar low beams is they burn out about 3 to 6 months at $20+ a pop. When I had them in my Subaru. So I installed the original low beam bulbs. But still running the Silverstar high beams.
Although I have not driven my van in the dark, I have turned them on and they produce a lot more light than the original bulbs.

The connector that would go to the headlight bulb plugs into a ballast then from there it goes into another smaller box then to the HID bulb.
I just wonder if these use less power than a standard halogen (H4) bulb?