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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.
Sinnamary is a town and commune on the coast of French Guiana, between Kourou and Iracoubo....
Solothurn ( SOH-lə-toorn, ZOH-, German: [ˈzoːlotʊrn] (listen); French: Soleure [sɔlœʁ]; Italian:...
Harrisburg ( HARR-iss-burg; Pennsylvania German: Harrisbarrig) is the capital city of the...