Candela per square metre

Common card · No. 430255

The candela per square metre (symbol: cd/m2; alternatively titled candela per square meter) is the unit of luminance in the International System of Units (SI). The unit is based on the candela, the SI unit of luminous intensity, and the square metre, the SI unit of area. The nit (symbol: nt) is a non-SI name also used for this unit (1 nt = 1 cd/m2). The term nit is believed to come from the Latin word nitēre, "to shine". As a measure of light emitted per unit area, this unit is frequently used to specify the brightness of a display device. The sRGB spec for monitors targets 80 cd/m2. Typically, monitors calibrated for SDR broadcast or studio color grading should have a brightness of 100 cd/m2. Most consumer desktop liquid crystal displays have luminances of 200 to 300 cd/m2. HDR displays range from around 400 to 2500 cd/m2.

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