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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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For the town in New Caledonia, see Païta.Paita is a city in northwestern Peru. It is the capital of the Paita Province which is in the Piura Region. It is a leading seaport in that region. It is located 1,089 km northwest of the country's capital Lima and 57 km northwest of the regional capital of Piura.
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