Barreiras | |
|---|---|
| State | Bahia |
Country | Brazil |
| Capital | |
| Population | 155519 |
Barreiras is a city located in the west of the state of Bahia, Brazil. It is the most important urban, political, technological and economic center of the western region of the state. Its economy is based on livestock raising and agriculture.
Lux | |
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| State | |
Country | |
| Capital | |
| Population | 0 |
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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