Cyalume ChemLight Military Grade Chemical Light Sticks, Red, 15" Long, 12 Hour Duration (Pack of 20) ChemLight military grade red light stick for providing illumination for up to 12 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