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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.
Highlands or uplands are any mountainous region or elevated mountainous plateau. Generally...
Santiago (, US also ; Spanish: [sanˈtjaɣo]), also known as Santiago de Chile, is the capital and...
Bari ( BAR-ee, Italian: [ˈbaːri] (listen); Barese: Bare [ˈbæːrə]; Latin: Barium; Ancient Greek:...
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