Lux vs Rybnik

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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.

In English, "lux" is used as both the singular and plural form.The word is derived from the Latin word for "light", lux.

Source: Wikipedia

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Rybnik [ˈrɨbɲik] (listen) (Silesian: Rybnik, German: Rybnick) is a city in southern Poland, in the Silesian Voivodeship. The city first developed as a fishing centre in the Middle Ages, hence the name of the city alludes to the trade. Rybnik then grew as an important centre of coal mining and the seat of the surrounding county in the 19th century.

The Rybnik area with its large coal reserves and power plants is an important economic region, and a notable center of music, home of the Szafrankowie Brothers State School of Music as well as a Philharmonic Orchestra.

Source: Wikipedia