At a mere 96 grams, the Quad is the lightest in Princeton Tec's line of regulated-LED headlamps. 4 Ultrabright LEDs power through the darkest conditions. The LEDs are safe forever inside a tough waterproof housing that will survive severe impacts and water submersions up to 1 meter. The wide beam of the Quad is perfect for tasks around camp and is bright enough for technical scrambles and brisk runs on dark trails. Weight conscious users will love the Quad's sophisticated circuitry that allows the use of lithium AAA batteries. They reduce the Quad's weight to 82 grams, perform in extremely cold temperatures, and significantly increase regulated burn times on all modes. Equipped with regulated LEDs that maintain constant brightness and a battery power meter, this light just may be smarter than you are.