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The standard lamp and shade that sits on a table is general lighting, while the desk lamp is considered task lighting. Magnifier lamps are also task lighting. Animated fountain in Moscow's Square of Europe, lit at night. The illuminated ceiling was once popular in the 1960s and 1970s but fell out of favor after the 1980s.
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An online shop evokes the physical analogy of buying products or services at a regular "brick-and-mortar" retailer or shopping center; the process is called business-to-consumer (B2C) online shopping. When an online store is set up to enable businesses to buy from another businesses, the process is called business-to-business (B2B) online ...
The spectrum of light emitted from a fluorescent lamp is the combination of light directly emitted by the mercury vapor, and light emitted by the phosphorescent coating. The spectral lines from the mercury emission and the phosphorescence effect give a combined spectral distribution of light that is different from those produced by incandescent ...
External lighting grew at a rate of 3–6 percent for the later half of the 20th century and is the major source of light pollution [40] that burdens astronomers [41] and others with 80% of the world's population living in areas with night time light pollution. [42] Light pollution has been shown to have a negative effect on some wildlife. [40 ...
These lamps are used for fluorescence effects where less visible light is ideal. 09 N/A Sun-tanning lamps: These lamps produce wide or narrow band UV-B radiation 10 BL Black-Light lamps: Black light lamps give off long-wave UV-A radiation of around 350-400 nm. They are often used to attract insects to traps.
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