I'm starting to think of the world of lighting and figure I should get some front lights on my bike. I was wondering if anyone knows how possible it would be to use a dynamo hub to power either an LED or HID system. I'm imagining the HID is probably out of the question (not a consistent enough source of voltage to keep the ballast/spark gap happy)

Thanks in advance for any advice (or whacks on the skull if this is just a stupid idea )