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filed under | recreation | science
A glow stick is a single-use translucent plastic tube containing isolated substances which when combined make light through a chemical reaction-induced chemiluminescence which does not require an electrical power source. Millions of glow sticks are sold annually. Glow sticks give off light when the fragile glass container inside breaks, mixing the two chemicals together. This chemical reaction then spreads to the whole glow stick as the chemicals mix further. This is why only a small part of the stick will glow when snapped but given a few seconds the entire stick is glowing. Glow sticks are used for many purposes. They are waterproof, do not use batteries, generate no heat, are inexpensive, and are disposable. They can tolerate high pressures, such as those found underwater. They are used as light sources and light markers by military forces, campers, and recreational divers doing night diving. Glow sticks are considered the only safe light source immediately following an earthquake, hurricane, tornado, and other emergency situations due to the fact that they do not use any kind of electricity to work and there is no danger of sparking. Because they do not have batteries or contain electrified filaments like normal flashlights they are safe for use in explosive environments. Special glow stick formulas emitting infrared radiation are used in conjunction with night vision devices. Glow sticks are used as lures for catching Swordfish. Glowsticking is the use of glow sticks in dancing. This is one of their most widely known uses in popular culture as they are frequently used for entertainment at parties , concerts and dance clubs. They are carried by marching band conductors for night-time performances; furthermore, in Hong Kong glow sticks are widely used during the annual Mid-Autumn Festival. Glow sticks carried by Trick-or-Treaters on Halloween neatly serve multiple functions as toys, readily visible and unusual night-time warnings to motorists, and luminous markings which enable parents to keep their brightly color-coded children in sight. Yet another aesthetic usage is for balloon-carried light effects. The Guinness Book of Records says the world's biggest glowstick, 8 ft 4 in tall, was built and illuminated at the opening ceremony of the second Bang Face Weekender at a holiday park in Camber Sands, East Sussex, England, on April 24, 2009. [READ THE REST OF THIS ARTICLE]
