For the dark winter days I bought this fixture to better morning and evening through the woods to get to work. I value the use of a dynamo, because I'm too lazy to always charge the battery pack. Thanks to LED technology, I now have a wow experience on the part of the illumination. The forest trails (approx 3m wide) I get good lighting to about 20 meters, leaving right and left still recognize what. The uniform illumination ensures a pleasant and stress-free driving with heavy darkness. Roots or other obstacles are now detected early enough. However react animals on the light paralyzed and flee rather late what exhorted to special caution.