Flexi powered 100L headlamp that can be powered by the included 3 x AAA batteries or an optional lithium battery sold separately. The Lumos FP100 is a dual-powered headlamp with 100 lumens of light. The single button operation allows you to easily cycle through the three light modes: low, high and flood. It’s water and impact resistant design ensures a high standard of quality and durability. Powered by the included 3 x AAA batteries or an optional lithium battery sold separately.