Good as a supplement to regular lighting of bikes.

This lamp is not suitable for a full-fledged bicycle lights, but complements an existing light fittings. It is very bright for its small size, the duration, and in the flashing mode. In the winter, especially in the evening hour, the flashing light is very well suited to be seen by other road users. I have tested them in the dark and in the rain and it works flawlessly. Even Dauerrregen makes this small lamp out of nothing. As already mentioned, replaced this light no StVO bicycle lamp, but still top and delivery from Amazon outstanding.