EXTREMELY BRIGHT 1200 LUMENS: (That's Bright!). Up to 6 Hours of CONSTANT light YOU can TRUST. Use the Flashing mode in daylight.......vehicles will stay clear of your path!! Also, one reason why this bike light is so much brighter than it's competition, is because of the LARGER EXTERNAL BATTERY PACK that is wired from the bicycle light to the back tube underneath the seat. One piece headlights cannot give this brilliant power for under $150+.. A REALLY COOL FEATURE: This light has a 3 mode computer chip, and then can be changed to a 5 mode light, giving you MORE FEATURES than any look-alike!!! Instructions given in package will help you learn how to do this. The modes include these light features- 1200 Lumens / 800 Lumens / 350 Lumens / 1200 Lumen Strobe / 1200 Lumen S.O.S.. MULTIPURPOSE: This extremely bright light can be also used for BIKING / CAMPING AND HIKING / RUNNING.....For EVERYTHING!!!. PHENOMENAL QUALITY!! FREE BONUS if you ADD to CART NOW!!!.