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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.
Athens ( ATH-ɪnz; Greek: Αθήνα, romanized: Athína [aˈθina] (listen); Ancient Greek: Ἀθῆναι,...
Manacapuru (Munychapur) is a municipality located in the Brazilian state of Amazonas.
Naha (那覇市, Naha-shi, Japanese: [naꜜha], Okinawan: Nāfa or Nafa) is the capital city of the...