This is a headlamp not too expensive that really shines very well. I use it in training trail and winter. Its maximum power is impressive attention only to the battery life. You have to put the little deflector in front of the bulb for lighting that is distributed evenly. Do not look directly the beam because the power is really dangerous. I had several times entitled to motorists flashing headlights !!! The only negatives: - Housing for batteries is a bit heavy (but these are not batteries and a battery ...) - Get used to the shadows on the sides of the look that gives an impression of running with a diving mask at the beginning!