This is one powerful light - with a bright white quality beam that reaches a long way.
It doesn't have the spread of some other lights though, meaning your peripheral vision is limited. We found the helmet bracket was fiddly to attach and the Velcro strap worked slightly loose. The separate cylinder-shaped battery doesn't fit into a bottle cage unfortunately and it wasn't that comfy in a jersey pocket when running the light on a helmet (where it does provide a good spotlight). If you want HID power from an LED and are into road or less technical riding this could be for you, but it's not our first choice for winter mountain biking.