Purposefully crafted to offer brighter and more consistent light, the Bushnell RUBICON headlamps pair top-quality Cree LEDs with proven optics technology developed during Bushnell's 65-year history. Providing 173 lumens of output, plus 209 lumens with the boost feature, the RUBICON H150L Headlamp serves as a dual output light with a spot for long range and a flood for wide proximity lighting. The rear mounted, external battery extends the runtime of the lamp, while the regulated circuit delivers consistent brightness throughout the useable life of the battery. Featuring a Red Halo low-lumen mode, the H150L Headlamp is designed to enhance sight without compromising natural night vision. Its multi-level light easily adapts to changing conditions and the battery saving lock-out prevents accidental power on. Certified by the American National Standards Institute (ANSI), each RUBICON headlamp has been tested for light output, beam distance, impact resistance (at one meter), protection against water penetration and run time.