Bushnell H150L Rubicon 3AA Headlamp Quality optics with stunning HD clarity 100% quality materials used and tested extensively Beautiful design and durability built to last 173 Lumens plus 209L boost feature Dual output: spot for long range, flood for wide proximity Battery saving lock-out prevents accidental power on Rear mounted external battery for extra-long runtime Red Halo low-lumen mode designed to enhance sight without compromising natural night vision