Cyalume Corporation specializes in light technology, chem lights, covert lights and much more. Providing innovative solutions for the past 50 years. The inventor of chemical light technology in the 1060's. Glow stick or light sticks are self-contained, short-term light-sources. They consist of a translucent plastic tube containing isolated substances that, when combined, make light through chemiluminescence, requiring no external energy source. The light stick cannot be turned off and is only be used once.