Re: Cool Idea for a high powered LED headlight
If you're going to use one of those Cree lights put a diode inline with the white wire. LEDs will run off AC but not for long. I tried one of the mag light retrofit bulbs (rated up to 12V) and it lasted about 15 minutes before started getting very dim and blinking. I probably spent enough trying different LED solutions for running off the white wire to buy one of the rechargeable LED setups. lol
Just A FYI but the mag only puts out 3w so you'll only have enough power to just light the head light unless you add a battery.
What I ended up using was a 3 watt LED, driver, reflector and a 6v SLA battery all bought off ebay for about $30 total and I'm VERY happy with it.