Cyalume 6-Inch ChemLight- The Cyalume ChemLight is a military grade light stick that meets the Defense Logistics Agency and NATO Maintenance and Supply Agency Specifications, and provides up to 8 hours of light. These Chemlights come individually wrapped, have a four year shelf life, and provide 360 degrees of illumination. With a non-toxic chemiluminescent substance and high light output these chemlights are great for your emergency lighting needs.