hula,
I just made a bike light, which a bought one would cost double or triple, plus, longer batt. life.
Here is where I got most of my inspiration.
www.thefathippy.com
I also used stereo connectors/wires for hook ups, and put them on the charger as well, so I just unplg the lights, and plug in the charger. It works really well. The fat hippy uses a 12v 20w halogen which you can easily buy at any hardware store, called an mr16. I used 3-5w halogens(mr11). they are 6v lights, but seem to work fine as long as I keep them cool in foward motion (a notion which has driven some nutty trying to figure out, I dunno, I just go with it
?) I should get about 4 hours @15w out of my 7amphe batt., and did get two hours the other night, riding 20 miles or so, just ran out of trail, with no noticable reduction in brightness.
2 hrs for the 20 watt. very bright very effective.
Why does everyone on this site seem to always recommend buying lights, I thought this was homemade lights site?
Geez?
Happy to answer any q's you might have about it all. I'm not an expert, but I've learned allot throught failure.
MikeH