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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.
Gelsenkirchen (UK: , US: , German: [ˌɡɛlzn̩ˈkɪʁçn̩] (listen); Westphalian: Gelsenkiärken) is the...
Brno ( BUR-noh, Czech: [ˈbr̩no] (listen); German: Brünn, German pronunciation: [bʁʏn] (listen))...
Jakarta (; Indonesian pronunciation: [dʒaˈkarta] (listen)), officially the Special Capital Region...