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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.
Kotzebue ( KOTS-ə-bew) or Qikiqtaġruk ( kik-ik-TUG-rook, Inupiaq: [qekeqtɑʁʐuk]) is a city in the...
Breda (, , Dutch: [breːˈdaː] (listen)) is a city and municipality in the southern part of the...
The Federal city of Bonn (German pronunciation: [bɔn] (listen) Latin: Bonna) is a city on the...
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