My left light will "flick" when my car came out from auto stop mode or when the car sit at idle. I have new HID blub put in and swap my ballast from left to right. My left light still doing the same. It only happen when car came back from the bodyshop( new hood ,new bumper etc). They did took out both headlights. Im thinking could it be grounding issue? Cause it does that when car change from discharging to charging stage.