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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.
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Dubá (German: Dauba) is a town in the Liberec Region of the Czech Republic. It has a population of around 1,700.
Stuttgart (German: [ˈʃtʊtɡaʁt] (listen); Swabian: Schduagert [ˈʒ̊d̥ua̯ɡ̊ɛʕd̥]; names in other...
A pearl is a hard, glistening object produced within the soft tissue (specifically the mantle) of...
Coos Bay is an S-shaped inlet where the Coos River enters the Pacific Ocean, approximately 10...
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