Review on Stay Safe Anytime With Cyalume Yellow Emergency Glow Sticks - 10-Pack Of 6” SnapLight Survival Glow Sticks For Emergency And Hiking by Joshua Huan

I've used two lights. They last a fairly long time. But these are not meant to last very long anyways. They are used for emergencies - say for example if there is an earthquake, you use these because there could be gas leaks or water near electrical wires. These could also be used underwater. And lastly they are used to call attention by rescuers or so that family can find you.They really aren't used for camping because flashlights are so much more energy efficient with LEDs.So remember for emergency situations and these have a very long shelf-life unlike batteries (specially if you leave them inside a flashlight, but again with LED, now it can be more forgiving to leave flashlights on because they last longer).