Skilcraft Chemlights are non-toxic, non-flammable sources of light. Designed for emergency, safety, and signaling use. They provide safe, effective lighting without head, sparks, or flame. Compact size for easy portability. Lightstick is waterproof. 15", 12 hour, 5 per box. Designed for a variety of applications, these non-toxic, non-flammable lightsticks offer a safe and dependable source of light giving up to 12 hours of glow time. The waterproof, compact design makes them perfect for both indoor and outdoor use.