An optical fiber is a flexible filament made of extruded glass or plastic. These optical fibers transmit light between the two ends of the fiber and find wide usage in fiber-optic communications, where they permit transmission over longer distances and at higher bandwidths (data rates) than wire cables.
Commonly, fiber optics are used for the transmission of light for decorative purposes. Fiber-optic technology is used in Christmas lighting, especially by incorporating it into artificial Christmas trees. Incandescent lamps or LEDs are located in the tree base, and many optic fibers extend from the lamps to the ends of the tree branches. These devices frequently use a step-down transformer because they have only one or two lamps or LEDs as the light on the source end, thus saving electricity.
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