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. Maximum shelf life is 48 months. Mandatory only for Defense Logistics Agency Troop Support. 6", 5 minute, ultra high intensity, 10 per box.