I bought this lamp twice (by far) and have to say for my purposes, as bright as day flashlight and also (at least for a while) as a light on the bicycle (with appropriate support) it is really to use Super. We are thus driven through the whole of Germany, and had at no time problems with the light output, clean delimited Lichtenfeld and really shock-resistant (even at bösestem cobblestones) About the technical data and the luminosity lot has been written and enough. Was for my purposes, at the wheel, as a flashlight for walking and for any occasion in the needed amount of light is great and I am extremely satisfied. She is frugal in its battery consumption is excellent and focusable light enough so that the belt (bag's case) to be several hours on the road. For me, the best lamp in the price range and size. Therefore from me 5 stars