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The lux (symbol: lx) is the SI derived unit of illuminance, measuring luminous flux per unit area. It is equal to one lumen per square metre. In photometry, this is used as a measure of the intensity, as perceived by the human eye, of light that hits or passes through a surface. It is analogous to the radiometric unit watt per square metre, but with the power at each wavelength weighted according to the luminosity function, a standardized model of human visual brightness perception.
Annecy (US: AN-ə-SEE, ahn-SEE, French: [ansi] (listen); Francoprovençal: Èneci or Ènneci) is the...
Uttlesford is a local government district in Essex, England. Its council is based in the market...
Koblenz (German: [ˈkoːblɛnts] (listen); French: Coblence), spelled Coblenz before 1926, is a...