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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.
Cairo ( KY-roh; Arabic: القاهرة, romanized: al-Qāhirah, pronounced [ælˈqɑːhɪɾɑ] (listen),...
Langé is a commune in the Indre department in central France.
Oslo ( OZ-loh, also US: OSS-loh, Norwegian: [ˈʊ̂ʂlʊ] (listen), rarely [ˈʊ̂slʊ, ˈʊ̀ʂlʊ]) is the...
La Rinconada is a municipality located in the province of Seville, Andalusia, Spain. According to...