A super compact light great for both mountain and road which claims to have the best battery life on a bike light with this many lumens

• Supercharged 1:15 to 85 hour run time
• Extremely powerful 1,800 lumens in the most compact and stylish form
• Cycling Tuned Optics™ throws a long range, extra wide beam to cover road and mountain biking
• Daytime visible flashes make you stand out on busy streets
• Two-button design lets you fine tune the brightness and flash speeds to your cycling needs
• Expand run times beyond factory default settings by fine tuning the brightness modes and flash speeds
• 9 lighting modes for day and night use
• SteadyPulse® mode alerts motorists with attention grabbing pulses while its overlapping steady beam constantly lights your way at night
• DayLightning® flash mode bursts lightning-like flashes to make you stand out in broad daylight on busy streets
• IP67 water resistant for use in all weather conditions
• USB rechargeable with 5 hours recharging time
• Designed, engineered, and assembled in the USA
• Weight: 252g.