Streamlight Vantage Helmet Mounted Tactical Light - 69140C4 LED impervious to shock. Will not break or burn out! C4 LED is 2 3 times brighter than previous generation LEDs Features an ultra bright blue taillight LED Up to 4,500 candela peak central intensity; 80 lumens measured system output 6 hours of continuous runtime to the 10% output level Solid state current regulation for consistent illumination level Fits both traditional and modern style helmets Tighten clamp with your fingers. No tools necessary!