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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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Barranquilla (American Spanish: [baraŋˈkiʝa] (listen)) is the capital district of Atlántico Department in Colombia. It is located near the Caribbean Sea and is the largest city and second port in the northern Caribbean Coast region; as of 2018 it had a population of 1,206,319 making it Colombia's fourth-most populous city after Bogotá, Medellín and Cali.
Barranquilla lies strategically next to the delta of the Magdalena River, 7.5 kilometres (4.7 miles) (originally 25 kilometres (16 miles) before rapid urban growth) from its mouth at the Caribbean Sea, serving as a port for river and maritime transportation within Colombia. It is also the main industrial, shopping, educational and cultural center of the Caribbean Region of Colombia. The city is the core of the Metropolitan Area of Barranquilla, with a population close to 2.4 million inhabitants, which also includes the municipalities of Soledad, Galapa, Malambo, and Puerto Colombia.
Barranquilla was legally established as a town on April 7, 1813, although it dates from at least 1629. It grew into an important port, serving as a haven for immigrants from Europe, especially during and immediately following World War I and World War II, when waves of additional immigrants from the Middle East and Asia arrived.
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