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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.
La Roë | |
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La Roë is a commune in the Mayenne department in north-western France.
Luxor (; Arabic: الأقصر l-aqṣur Egyptian Arabic pronunciation: [ˈloʔsˤoɾ], Upper Egyptian...
Sanming (Chinese: 三明; pinyin: Sānmíng, Foochow Romanized: Săng-mìng) is a prefecture-level city...
Sioux City () is a city in Woodbury and Plymouth counties in the northwestern part of the U.S....
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