Jumping up to AA batteries, the HL27 Headlamp not only goes up in brightness but also has the light dimming on the front of the headlamp to keep all the controls in one convenient place. It gives you the ability to shine an ultra wide flood beam and then quickly twist the bezel to a long reaching spot beam with transition halo so that you can be ready for anything. With our Variable Light Control Technology onboard you can adjust the light output with the control wheel to any point between the lowest low and the highest high so you can have highly personalized output and runtimes.With Coast's commitment to quality, the HL27 Headlamp is impact resistant, weather resistant and its LED is virtually unbreakable. The HL27 Headlamp is backed by Coast's lifetime warranty against defects in materials and workmanship. Tested and rated to ANSI/FL1 standards.