Coghlan's 5 L.E.D. Headlight Coghlan's 5 LED Headlight features 5 Super Bright Nichia White LED's Includes a four mode operation: 1 LED, 3 LED, 5 LED, and flashing, and an adjustable inclination and head strap Estimated batter life: 100 hours using 1 LED; 35 hours using 3 LED, 25 hours using 5 LED, 68 hours using Flashing