With a 4000mAh large battery and max 1000 lumens, the Ravemen CR 1000 is designed for road bikers that ride at night at fast speeds and long distances. Featuring Ravemen’s new anti-glare optical lens, the CR 1000 creates a T-shaped beam, illuminating the road with a flood light for close-range distance and a bright spotlight for far distance while has no dazzle to other road users. With battery run time extension, CR 1000 could be also used at long-distance riding and race. Light Modes High - 1000 lumens - 2 hours Mid - 600 lumens - 2.7 hours Low - 350 lumens - 5.8 hours Eco - 100 lumens - 25 hours Pulse Flashing - 500 lumens - 43.5 hours Rapid Flashing - 150 lumens - 45 hours Emergency - 1000 lumens