I was looking for a light for the evening runs in winter and have come to the Black Diamond on test. A really good light. Light and extremely bright, the light output than enough for unpaved roads in total darkness, much more than I expected. It lies close to the head on, nothing wobbles or can push at the running movements. Another advantage is that one does not need batteries, the battery is easily charged via a USB port and that in the battery compartment on the back of the head is equal to (a turn-off) LED flashlight is: you do not need separate lights to perceived from behind to become. Sophisticated and well: full marks
