Exposure Lights Strada Mk10 Super Light Rechargeable Headlight - Super Light and compact for the urban rider who needs the capability to go on into night when the streetlight ends.Road Specific Beam uses dual lenses to deliver an optimum beam for road cycling with a flat beam for the periphery and a spot beam lighting the way ahead, which can by dimmed for oncoming traffic via a wired handlebar mounted switch2-36 hr run time