I run several different types of dynamos. The oldest being a 1950's Sturmey Archer Dyno hub that puts out 1.6watts. The newest being a Sturmey Archer that puts out a solid 3 watts. I also have sidewall drive dynamos as well as bottom bracket mount. Lights range from 1980's halogen to the newest generation of LED lamps from Busch and Muller.(website is in German, not sure why the English part isn't working). On bikes that get ridden occasionally I use the bottom bracket generator or the sidewall generator. On bikes that are going to be ridden at night on a regular basis I use the hub generators, with LED lights. I do use a battery powered flasher mounted on the seat post as a back up for the regular tail light. All of my LED lights have the stand light which gives you some light when stopped for up to 5 minutes.

Dyno hubs don't have to be super expensive, especially if you build your own wheels. One of the best deals I have seen is a Sanyo dyno hub, I have one on a city bike that my sister has been using, so far it has about 3,000 miles on it with no issues.

They do make a universal charger that works with the dyno hubs B&M Ewerks. Dahon has a similar unit available. I don't have one...yet, but may get one for touring in another year or so.

Aaron