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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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Lansing is the capital of the U.S. state of Michigan. It is mostly in Ingham County, although portions of the city extend west into Eaton County and north into Clinton County. The 2010 Census placed the city's population at 114,297, making it the fifth largest city in Michigan. The population of its Metropolitan Statistical Area (MSA) was 464,036, while the even larger Combined Statistical Area (CSA) population, which includes Shiawassee County, was 534,684. It was named the new state capital of Michigan in 1847, ten years after Michigan became a state.
The Lansing metropolitan area, colloquially referred to as "Mid-Michigan", is an important center for educational, cultural, governmental, commercial, and industrial functions.