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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.
Petropavlovsk-Kamchatsky | |
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| Population | 180454 |
Petropavlovsk-Kamchatskiy (Russian: Петропа́вловск-Камча́тский, tr. Petropavlovsk-Kamchatskiy, IPA: [pʲɪtrɐˈpavləfsk kɐmˈtɕatskʲɪj] (listen)) is a city and the administrative, industrial, scientific, and cultural center of Kamchatka Krai, Russia.
Adelaide ( (listen) AD-ə-layd) is the capital city of the state of South Australia, and the...
Stony Rapids is a northern hamlet in Northern Saskatchewan, Canada. It is located 82 kilometres...
San-Lorenzo is a commune in the Haute-Corse department of France on the island of Corsica.
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