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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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Evansville is a city in, and the county seat of, Vanderburgh County, Indiana. The population was 117,429 at the 2010 census, making it the state's third-most populous city after Indianapolis and Fort Wayne, the largest city in Southern Indiana, and the 232nd-most populous city in the United States. It is the commercial, medical, and cultural hub of Southwestern Indiana and the Illinois–Indiana–Kentucky tri-state area, home to over 911,000 people. The 38th parallel crosses the north side of the city and is marked on Interstate 69.
Situated on an oxbow in the Ohio River, the city is often referred to as the "Crescent Valley" or "River City". As a testament to the Ohio's grandeur, early French explorers named it La Belle Rivière ("The Beautiful River"). The area has been inhabited by various indigenous cultures for millennia, dating back at least 10,000 years. Angel Mounds was a permanent settlement of the Mississippian culture from 1000 AD to around 1400 AD. The European-American city was founded in 1812.
Three NYSE companies (Accuride, Berry Global, and OneMain Financial) are headquartered in Evansville, along with the global operations center for NYSE company Mead Johnson.
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