I got me the light in December 2013. mounted on my old bicycle. I use the bike every day for the ride to the station. Over Christmas I light two weeks not in use. In the New Year I am so perhaps pedaled 7 days after the parking light went kaput. The light is only rotates the Dynamo. Once I stop is from the light. The Anschlussbeschreibubg in the package was rather poor. I guess I got the lamp connected.