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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.
Belo Horizonte (Portuguese pronunciation: [ˈbɛlu oɾiˈzõtʃi], locally [ˌbɛloɾiˈzõtʃi] (listen);...
Tsuruoka (鶴岡市, Tsuruoka-shi) is a city in Yamagata Prefecture, Japan. As of 31 January 2020, the...
Palermo ( pə-LAIR-moh, -LUR-, Italian: [paˈlɛrmo] (listen); Sicilian: Palermu [paˈlɛmmʊ],...