ChemLight military grade red light stick for providing illumination for up to 30 minutes ( MAY BE UPGRADED TO 12 HOUR CYALUME TACTICL RED DEPENDING ON STOCK) Measures 6" 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 Current Exp 09/2023 or better