Cyalume Chemlights© are the only milspec chemical light sticks available on the market. These 6” Chemlights© provide instant 360° illumination that can be seen up to a mile away. Chemlights© are used heavily by military, law enforcement, and first responders as marking devices. Their use potential is unlimited. To activate, simply bend, snap, and shake the tube. Cyalume Chemlights© meet Defense Logistics Agency (DLS) and NATO Maintenance and Supply Agency (NAMSA) specifications. Each Chemlight© comes individually sealed in protective foil for protection from light and moisture, giving them up to a 4-year shelf life from date of manufacture.