Our 12 hour Green light stick will glow brightly for a minimum of 12 hours, just bend and snap for any emergency. Our light sticks have a 4 year shelf life and are individually wrapped. Detailed Description Just bend and snap for 12 hours of emergency lighting - no more dead batteries! Great for emergencies, outdoors, and just plain fun! Have up to a 4 year shelf life (not only 2 years like other light sticks) and these light sticks glow brightly for a minimum of 12 hours. Each light stick is individually wrapped. Light sticks used by the U.S. Military and Homeland Security.