Cyalume ChemLight  Military Grade Chemical Light Impact Sticks, White, 15" Long, 12 Hour Duration (Pack of 5) ChemLight military grade white light stick for providing illumination for up to 8 hours Measures 15" long and provides 360 degrees of illumination Meets military specifications Chemiluminescent substance is non-toxic and plastic body is phthalate free for safety Four-year shelf life from date of manufacture for a maintenance-free alternative to other lighting