Téra vs Lux

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Téra is a city in the Tillabéri Region, Tera Department of Niger. It is situated 175 km north-west of the capital Niamey, close to the border with Burkina Faso.

It is mainly inhabited by Songhai, Fulani, Gourmantche and Buzu ethnic groups. The majority of the population are farmers.

Source: Wikipedia

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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