Cyalume ChemLight sticks are the reference in light sticks used by military, law enforcement, and emergency services. They provide intense and reliable illumination for up to 12 hours with 360-degree visibility. Waterproof, non-toxic, and non-flammable. Each light stick is individually packaged to protect it from light and moisture. 4-year duration from the manufacturing date indicated on its individual packaging. Meets the specifications of the NATO Support and Procurement Agency and the US Department of Defense Agency. Cyalume is the only authorized manufacturer for purchasing on the NATO Nomenclature Number (NNO) product base.