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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.
In Amguel | |
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Population | 4208 |
In Amguel (Arabic: عين امقل, lit. Amguel spring) is a town and commune in Tamanrasset District, Tamanrasset Province, Algeria. According to the 2008 census it has a population of 4,208, up from 3,030 in 1998, with an annual growth rate of 3.
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