Maybe you need fresh batteries or a good recharge
Back to the HID for a moment, from last night:
I had some issues with the HID lamp, flickering, making some noise, and turning itself off. However I'm trying to get to the bottom of that at the moment, it hasn't put a foot wrong otherwise.
It could well be battery related, I just don't know at this stage, waiting to hear back from the guy I bought it off.