Max Output 1,000 LumensMax Beam Distance 255 mMax Beam Intensity 16500 cdMax Runtime 20 h 0 m / 0.83 dLED NiteLab UHi 20 LEDReflector SMOBattery 2 × AA, 1 x NL1416RBeam color White LightLength 142.8 mm / 5.62 inHead Size 19.7 mm / 0.78 inWeight 40 g / 1.41 oz