I'm using Busch & Müller headlight and taillight. These are made for generators (dynamos). I have a Sanyo dynamo hub. I like not having to think about batteries. This setup should last longer than most battery lights.

The headlight throws a queer beam: it's rectangular. I'm sure this is the result of highly detailed German government regulations. There are many regulations about bike lights there. For instance, bike lights MUST be dynamo-powered. Batteries are not allowed.

I don't know how many lumens it produces. Not many, really, but it's enough for me to see far ahead enough at 25mph, which is plenty fast enough in the dark.

The lights have a Ständlicht feature (stand light): the lights stay on even after you stop. The headlight also has a switch with three positions: off, on, and auto. If I left it in auto, it would light up only when needed. But I decided a daytime running light can't hurt.

If anyone is interested in learning more about my setup, I'll look up the records I have from what I bought.