What good is the brightness when you order comes in the rain and after a short time the lamp left the service? An e mail to Fa.Busch Müller was not even answered. So the lamp and see a block open since just right of the + connection of 8 Füßler Led burned) boards Nr. BUM IBI EO82_V02. What good is all this if the manufacturer's service is below any minimum standard. I still Sigma lamps for second bike because I had such problems so far. "" Where there is light there also plenty of shade "" "