The NiteRider Lumina 1100 Headlight is capable of operating in almost any ride condition, from low-light road conditions to mountain bike trails. The 1100 features an all new Boost Mode light setting that allows you to operate the light at its maximum output by simply double clicking the power button and produces a beam pattern with a generous long-distance spot and wide flood beam pattern of 1100 lumens. A CREE 6000k LED bulb is utilized and considered to be the best LED available on the market today. And with a body casing made from a lightweight, high-strength aluminum and Dupont Fiberglass reinforced nylon, the NiteRider Lumina 1100 is an ultra-powerful and highly durable headlight, loaded with great features.Features: New Boost Mode, double tap power button to unleash maximum LED output at 1100 lumens! 5 Light Levels plus 1 Daylight Flash Mode FL1 Standard IP64, dust and water resistant Easy on and off handlebar strap mount with quick release tab Fits standard and oversize 35mm handlebars Perfect for helmet mounting (Helmet Mount sold separately) IntelliCharge -- Reduce charge time in half! Convenient USB rechargeable Low battery indicator Lock Mode, perfect for use during storage and transporting the light. Press and hold power button for 7 seconds to lock out operation of light.