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Oran ( o-r-an; Arabic: وَهران, romanized: Wahrān also UK: , US: , French: [ɔʁɑ̃]) is a major coastal city located in the north-west of Algeria. It is considered the second most important city of Algeria after the capital Algiers, due to its population, commercial, industrial, and cultural importance. It is 432 km (268 mi) from Algiers.
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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.