thumb| 1. a plastic casing covers the inner fluid. 2. a glass capsule covers the solution. 3. phenyl oxalate and fluorescent dye solution 4. hydrogen peroxide solution 5. after the glass capsule is broken and the solutions mix, the glowstick glows. a glow stick is a self-contained, short-term light-source. it consists of a translucent plastic tube containing isolated substances that, when combined, make light through chemiluminescence, so it does not require an external energy source. the light cannot be turned off, and can be used only once. glow sticks are often used for recreation, but may also be relied upon for light during military, police, fire, or ems operations. == history == cyalume was invented by frank arthen and laszlo j. bollyky of american cyanamid, based on work by edwin a. chandross of bell labs. other early work on chemiluminescence was carried out at the same time, by researchers under herbert richter at china lake naval weapons center. several us patents for "glow stick" type devices were received by various inventors. most of these are assigned to the us navy. the earliest patent lists bernard dubrow and eugene daniel guth as having invented a packaged chemiluminescent material in june 1965 (patent 3,774,022). in october
Light_sources Lighting Luminescence Party_favors Underwater_diving_safety_equipment