I have recently had a problem with my HID's flcikering and switching off and on again. This genrally happens when the lights have been on for some time but can happen sooner at times. I have recently fitted new bulbs (Osram CBI's) but dont think it is the bulbs as it was doing it before I fitted them, just no so much - or maybe I didnt notice as the old bulbs were quite dim. Does anybody know why this is happening? I hope it is not the ballasts as they are very expensive to replace!