With 400 Lumens of vibrant white light, our 3 ounce Helmet Mounted Light attaches to a variety of standard helmets with rail capable systems. The three operating modes: constant, momentary and strobe provide a concentrated, high-intensity beam to fill your field of view for close to mid-range target identification. Extensively tested for performance, durability and reliability, its compact, durable design is simple and easy to mount, with no need for additional tools. High efficiency emitters provide up to 1.5 hours of runtime in white mode, or 4 hours in infrared mode; instantaneously switch between modes with just a flip of the lever. In addition, the easy-to-operate lockout system ensures the light isn't activated until you're ready.