military grade green light stick for providing illumination for up to 12 hours Measures 6" long and provides 360 degrees of illumination Meets military specifications 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 Pack of 6 Current EXP date 2027 OR BETTERWE have used this product 5 years after expiration and they work fine