OK - remember I'm still awaiting to do a road test!

DiegoFrogs: The beam is a blue-tinted white beam, not quite as harsh as the car headlamps you mention - those are high intensity discharge (HID) bulbs. One motivation for the project was the fact that the tint of these lights stands out against the yellowish tint of all the other incandescent bulbs. I don't think it will cause discomfort though.

Hillrider: I started with the light housing, batteries and charger from an original purchase of £25 about 6 years ago for the rechargeable halogen system. The new LED bulb cost £10.50 (about $16, give or take the exchange rate.) Not sure what one would pay in the USA, but probably less, as is generally the case. Other parts I had to hand, including a small amount of sheet aluminium, resistors, wire, nuts & bolts etc, so the cost is all in the bulb for this job. I cant see these "sundries" being terribly expensive though.

OK, I'm off for a night commute to "put my money where my mouth is"

I'll check in again tomorrow,

Cheers,

Ed