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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.
Rostov-on-Don (Russian: Ростов-на-Дону, tr. Rostov-na-Donu, IPA: [rɐˈstof nə dɐˈnu]) is a port...
Miaoli City (Wade–Giles: Miao²-li⁴; Hakka PFS: Mèu-li̍t-sṳ; Hokkien POJ: Biâu-le̍k-chhī or...
Bastia (UK: , US: , French: [bastja] (listen), Italian: [baˈstiːa]; Corsican: Bastìa [baˈsti.a])...
Oakland is the largest city and the county seat of Alameda County, California. A major West Coast...