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What is fluorescent light

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Date:2015-07-10
A fluorescent light or a fluorescent tube is a low pressure mercury-vapor gas-discharge light that uses fluorescence to produce visible light. An electric current in the gas excites mercury vapor which produces short-wave ultraviolet light that then causes a phosphor coating on the inside of the bulb to glow. A fluorescent light converts electrical energy into useful light much more efficiently than incandescent lamps. The typical luminous efficacy of fluorescent lighting systems is 50–100 lumens per watt, several times the efficacy of incandescent bulbs with comparable light output.
 
Fluorescent light fixtures are more costly than incandescent lamps because they require a ballast to regulate the current through the light, but the lower energy cost typically offsets the higher initial cost. Compact fluorescent light are now available in the same popular sizes as incandescents and are used as an energy-saving alternative in homes.
 
Because they contain mercury, many fluorescent light are classified as hazardous waste. The United States Environmental Protection Agency recommends that fluorescent lamps be segregated from general waste for recycling or safe disposal.
 
Light tubes or light pipes are physical structures used for transporting or distributing natural or artificial light for the purpose of illumination, and are examples of optical waveguides. In their application to daylighting, they are also often called tubular daylighting devices, sun pipes, sun scopes, or daylight pipes. Light pipes may be divided into two broad categories: hollow structures that contain the light with a reflective lining, and transparent solids that contain the light by total internal reflection.

led replacement for fluorescent tubes:led tube lights

Keywords for the information: fluorescent tube

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