have the lamp already more than 2 years in use. There were no defects. For the price you can not complain, the lamp is very easy, you do not realize that it is mounted on the helmet in principle. However, if you look for a workable, light lamp for night trail excursions, then must be something to dig deeper into their pockets, because that it is neither bright enough nor is the beam wide enough. I use them now in the lowest level as a normal lamp on the handlebars for the way home on forest highway and street (and as an emergency light, if the battery of the "right" helmet lamp fails times).
