[MENTION=365354]nob[/MENTION], dynamo lights are still not popular in the US (or Canada, I believe), but they are worth a look. I have a few bikes, and the few I ride regularly have dynamo lights. The reason is that while I can keep track of all the things I need to charge, the prospect of my headlight running out before my need runs out is a little scary. I like the absolute guarantee that my headlight will work no matter what.

The way dynamo lights bolt on is also convenient. You might think they would be theft targets, but that has proven not to be the case. Thieves carry cable cutters but not wrenches.

Here is my blog post on my dynamo lights. I should write a revised one, because I've switched to a different bike on most of my rides. The whole setup cost me $160 with tail light, which sounds like a lot, but it has paid off.

I battery powered lights on some of my bikes, and I ended up spending a lot on them, too, because I was dissatisfied with the low-priced lights.