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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.
Merced (Spanish for "Mercy") is a city in, and the county seat of, Merced County,...
Chernivtsi (Ukrainian: Чернівці́, romanized: Černivci [tʃern⁽ʲ⁾iu̯ˈts⁽ʲ⁾i] Polish: Czerniowce,...
Detroit Lakes is a city in the State of Minnesota and the county seat of Becker County. The...