Cateye EL520, front cycle light The EL-520 is a highly versatile front lamp that uses 4 x AA batteries (included) to deliver 1200 candlepower for 120 hours in high beam mode or 240 hours in low-beam mode. The ultra bright LED is a focused by the excellent ' Opticube' lens and side-visible. This light will keep you seen at roundabouts & other traffic situations & let you see when off street-lit areas. This light is tiny, making it convenient to fit & use on the bike and carry around off the bike, and it still manages to cranks out as much brightness as many larger lamps. At more than 1, 200 candlepower this is plenty of light for casual riding or getting home from work. 50% brighter than the HL-EL510 High/low beams Uses 4 AA batteries More than 240 hours of runtime in low beam Side visibility Flex Tight™ mounting bracket