I finally finished my LED headlamp - 12 Watt, 650 Lumens, 115m throw

The bits came from:http://www.led-tech.de who were very helpful and http://www.taskled.com/ who supplied the current regulator - which is excellent and easy to use (5 light levels, thermal protection, one click high/low beam selection, low voltage warning and cutoff - which saves your battery pack)

I did a little video - Nick Barrable took the time to tell me it is boring - but it does show how bright the LED is compared with the best 1990's halogen technology. It is less boring if you have the sound turned ON and UP - otherwise it won't make sense at all...