Some good stuff at that site, but some of the fabrication of heatsinks and such, I don't have the tools to do myself.

I am intrigued by a couple of the ideas on there though. Mainly this and this.

I could get a Luxeon EndorStar 3 led, with a capacitor (not sure what one I need) to smooth out the low speed flicker. But I'm not sure how I would heatsink it and mount it in my light housing. I would like to keep the bike looking somewhat vintage. I just don't think a new looking fabricated light would look right on the bike. And then I would still have to work in the batteries or supercapacitor.

How big/how many supercapacitors would it take to run that Luxeon 3 led thing for 30 seconds?