I just installed my HID an i noticed on bumpy road or crossing the center divider my headlights seems bouncy...you can see that the light is vibrating up and down. I ma not sure if my headlight is loose or too tight. anyone else have this problem. Only had the car for 2 WEEKS never notice if the stock headlights did that or not.

 

Check your bulb it's probably not lock in place.

 

thanks...will open it up again tonight to check it out...its really annoying driving at night with the lights being so bouncy

 

Yeah I had that before, the the bulb not locked in properly into the housing. It always feels like it's in, but once you wiggle it a little it comes loose almost.

Give it a try.