I had to take care of the task for our Lauftreff headlamps. As I discovered not an easy task with such a wide range. I am glad to have found the reviews of the other runners and can agree with the good arguments only. The luminosity is uniquely bright and very broad in the beam. The comfort is great. The rubber band can be adjusted easily and holds up well in place. Even changing the batteries is a breeze. In short price / performance voices since the batteries are already included. The lights were so good, the runners who already own headlamp had they looked this re-ordered because they found next to the SIGMA quite pale. Conclusion, who runs fast and needs a lot of light is right with this lamp.