NiteRider Handlebar Mount 900+ lm Bicycle Headlights
About NiteRider - "Our promise is to continually push the boundaries of lighting technology and bring you the most advanced, highest performing bicycle lights available in the world."
These include a mount for bicycle handlebars.
A lumen is a measure of the total "amount" of visible light emitted by a source. The higher the lumen rating, the brighter the light.