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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.
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Kiel (German: [kiːl] (listen)) is the capital and most populous city in the northern German state of Schleswig-Holstein, with a population of 249,023 (2016).
Kiel lies approximately 90 kilometres (56 mi) north of Hamburg. Due to its geographic location in the north of Germany, the southeast of the Jutland peninsula and the southwestern shore of the Baltic Sea, Kiel has become one of the major maritime centres of Germany. For instance, the city is known for a variety of international sailing events, including the annual Kiel Week, which is the biggest sailing event in the world. Kiel is also known within modern history for the Kiel Mutiny, where German sailors refused to board Navy vessels in protest against Germany's continued fighting in World War I which led to the abdication of the Kaiser and the formation of the Weimar Republic. The Olympic sailing competitions of the 1936 and the 1972 Summer Olympics were held in the Bay of Kiel.Kiel has also been one of the traditional homes of the German Navy's Baltic fleet, and continues to be a major high-tech shipbuilding centre.
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