I have been using this light for night time commuting on a poorly-lit stretch of road. The light illuminates the very dark roadway with its 400 lumens and I can run it in low power mode when I'm in more brightly lit areas. However, the rubber band that's used for mounting this headlight to a handlebar is garbage. If you stretch it tight enough to keep the headlight from moving around while riding, the band pops off the sides. I would have given this light 5 stars if not for this inadequate mounting point.