Limelight

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Limelight is a type of stage lighting once used in theatres and music halls. Although it has long since been replaced by electric lighting, the term has nonetheless survived, as someone in the public eye is still said to be "in the limelight". An intense illumination is created when an oxyhydrogen flame is directed at a cylinder of calcium oxide (lime), which can be raised to white heat without melting. The light is produced by a combination of incandescence and candoluminescence[citation needed].

The limelight effect was discovered in the 1820s by Goldsworthy Gurney, based on his work with the "oxy-hydrogen blowpipe", credit for which is normally given to Robert Hare. In 1825, a Scottish engineer, Thomas Drummond (1797–1840), saw a demonstration of the effect by Michael Faraday and realized that the light would be useful for surveying. Drummond built a working version in 1826, and the light is sometimes known as the Drummond Light after him.

Limelight was first used in public in the Covent Garden Theatre in London in 1837 and enjoyed widespread use in theatres around the world in the 1860s and 1870s. Limelights were employed to highlight solo performers in the same manner as modern followspots. To this day, theatre followspots are referred to as limes. Limelight was quickly replaced by electric arc lighting in the late 19th century.

Look up limelight, in the limelight in Wiktionary, the free dictionary.
Lighting and Lamps
v • d • e
Incandescent: Conventional - Halogen - Parabolic aluminized reflector (PAR) Compact fluorescent lightbulb
Fluorescent: Compact fluorescent (CFL) - Linear fluorescent - Induction lamp
Gas discharge:  High-intensity discharge (HID) - Mercury-vapor - Metal-halide - Neon - Sodium vapor
Electric arc: Arc lamp - HMI - Xenon arc - Yablochkov candle
Combustion: Acetylene/Carbide - Candle - Gas lighting - Kerosene lamp - Limelight - Oil lamp - Safety lamp - Petromax
Other types: Sulfur lamp - Light-emitting diode (LED) - LED lamp (SSL) - Fiber optics - Plasma - El wire
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