Coghlan's 1 Watt L.E.D. Headlight Coghlan's 1-Watt LED Headlight features a 1 Watt Ultra Bright Luxeon LED, Three Digitally Controlled Brightness Levels-100%, 50% and 25% Includes an LED Battery power indicator and Flashing mode for emergencies DC-DC regulator maintains maximum light output throughout the entire battery life Estimated battery life: 3 hrs at 100%; 10 hrs at 50%; 24 hrs at 25%; 7 hrs - Flashing