Cygolite Centauri OSP 1500 Lumen Programmable Bicycle Headlight, Black, One Size 1500 lumen LED light output -integrating 2 industry brightest Cree XM-L LEDs with combination narrow and wide lenses for distant throw and wide spread OSP Technology: customize the light's brightness & flash speeds exactly how you want it, directly to the light without external hardware or software 8 versatile lighting modes: Boost &gt; High &gt; Med &gt; Low &gt; Steady Pulse &gt; Day Flash &gt; Slow Flash &gt; Walking; Lasts up to 32 hours on a single charge. Durable, water resistant aluminum alloy casing w/ power/programming button & light mode/battery level indicators on top of light for easy access Includes headlight, high capacity Li-Ion battery, 2' extension cable, smart charger, Lock-tite handlebar mount, and helmet mount