24 hours. The 24 Hour Headlamp is built for hunters who need a reliable, bright light to get them to and from their blind. With four modes including, 24-hour, 12-hour, and 8-hour white, and green, the headlamp will adapt to any need. Its rugged molded housing withstands various environmental conditions. The quick off feature quickly turns the light off without having to toggle through modes. An adjustable head strap will securely fit to every user’s head.