The Halo Light is a patented 360° personal active safety system (PASS) that attaches to any hard hat and produces a ring of light around the wearer enabling him or her to see and be seen in all directions at all times. The Halo Light connects securely to almost any hard hat and provides visibility at all times in all directions over 1/4 mile away, fully illuminating your task area out to your visual periphery. It also uses a rechargeable lithium-ion battery that provides up to 12 hours full power.