The Eos Tactical headlamp is compact, military tough and is housed in an ultra light, 3 AAA platform. The Eos Tactical also has an easy-to-change lens filter system designed for specific nighttime 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 Eos Tactical - strong, stealthy, state-of-the-art. Power: 45 Lumens, Lamp: 1 Maxbright LED, Burn Time: 121 Hours, Batteries: 3 AAA Alkaline or Lithium, Weight: 103g.