The Cyalume Snap Light is an industrial grade chemical light stick providing instant 360 degree illumination, that can be seen up to a mile away in optimal conditions. The Snap Light is waterproof, buoyant, non-toxic, and non-flammable. To activate the light stick, bend, snap and shake the tube. The light stick has a hook and hole top, for hanging or attaching the light. Each light stick is individually foil-wrapped for protection from light and moisture, and has up to a five-year shelf life from date of manufacture. Durable, waterproof, external body of the light stick is made from low density polyethylene (LDPE), and is phthalate free for safety. Illuminating chemical substance is non-toxic and non-flammable. Light sticks are chemiluminescent substances in plastic tubes that provide hours of illumination in a number of safety, industrial, and military applications. Cyalume light sticks do not produce heat and are non-sparking, which makes them useful in hazardous situations where sparks or flame could cause an explosion. Cyalume provides dependable light for use in emergencies such as blackouts, industrial accidents and natural disasters.