Like the Prinston Tec Quad Tactical, the Tac Eos headlamp is compact, military tough and is housed in an ultra light, 3-AAA platform. The Tac Eos also has an easy-to-change lens filter system designed for specific night time activities: red for preserving night vision, blue for blood tracking and green for hunter safety. Each has four output modes the strongest of which can shine the 1 watt Maxbright LED a staggering 56m! The Tac Eos strong, stealthy, state-of-the-art.