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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.
Nova Friburgo | |
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Population | 173989 |
Nova Friburgo (Portuguese pronunciation: [ˈnɔvɐ fɾiˈbuʁɡu], German: Neufreiburg, English: New Fribourg, commonly referred to as just "Friburgo") is a municipality in the state of Rio de Janeiro in southeastern Brazil. It is located in the mountainous region, in the Center Mesoregion of the state, 136 km (85 mi) from its capital Rio de Janeiro.
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