The Halo is 360° Personal Lighting that attaches to a hard hat and produces a ring of light around the wearer, enabling him or her to See and Be Seen in all directions. It is visible over 1/4 mile away and eliminates shadows no matter where you move. Its powerful flood task light illuminates to the visual periphery for improved work efficiency. The Halo provides up to 202 lumens of power and has four light modes: Halo (full brightness in 360°), HI-Alert (rotating/pulsing light), Task (200% power to the front third of the Halo), and Dim (low power 360° illumination). A single button at the front of the Halo controls the light modes and turns the Halo on/off. The Halo was built tough to survive in rough construction environments and has an IP Rating of 67 to protect against dust, dirt, and water. It is powered by a single, rechargeable 18650 Lithium Ion battery that provides 5 ½ to 34 hours of runtime (mode dependent) and is easily swapped out.