This lamp excited right away by a truly exceptional workmanship. Properly funny it is, however, when you turn on the lamp - the luminous efficiency is terrific! To 30 meters away Nachbragrundstück rüberzuleuchten - and still easily erkenen everything there - is a breeze. It has already been mentioned in another review, that the light cone is too short in order to illuminate the path that lies ahead. I can confirm that, for pure cycling operation is somewhat limited. However, I see the potential of this lamp is not only the bike, but also as a normal flashlight. As an all lamp that can also at any time can unclip ans bike, it is absolutely worth 4 stars!