Cygolite Metro 550 USB Rechargeable Bike Light, Powerful 550 Lumen Bicycle Headlight for Road Cycling and Commuters, 6 Different Lighting Modes for Day and Night Safety 550 lumens engineered to amaze. See the difference this powerful 550 lumen light can make in illuminating far and wide onto the road at night Stand out in broad daylight with boosted 600 lumen DayLightning mode. This one-of-a-kind flash mode acts as daytime running lights to maximize safety Patent pending SteadyPulse mode alerts motorists with attention grabbing flashes while an overlapping steady beam constantly lights your way at night 6 powerful light modes to choose: High (1:30 hr run time), Medium (3 hr), Low (11 hr), SteadyPulse (3:30 hr), DayLightning (10 hr), Walking (150 hr) Built tough and water resistant. Cygolites been producing innovative bike lights in California since 1991. Dont be fooled by cheap imitations