Petzyl Tactika XP Adapt 40 Lumen Output and 120 Hour Battery life with 4 diffusion filters, Red, Green, Blue and White make it an ideal military headtorch. It has Flood and Spot Beams and the slide across filter is easily changed for different colours and it even has a lens carrier that sits on the straps. It as 4 light modes, 3 Brightness and 1 flashing strobe. It also has a Boost button for extra range.