![]() ![]() Nits are simply the measurement of the level of light (luminance) in a given area which the emitting source sends to your eyes or a camera sensor. It’s easiest to think of a TV as emitting light directly, in much the same way as the Sun does. ![]() One nit is equivalent to one candela per square meter, where the candela is the amount of light which has been emitted by a common tallow candle, but NIT is not part of the International System of Units (abbreviated SI, from Systeme International, in French). NIT and cd/m 2 (candela power) represent the same thing and can be used interchangeably. As a measure of light emitted per unit area, this unit is frequently used to specify the brightness of a display device. The term nit is believed to come from the Latin word nitēre, “to shine”. The nit (symbol: nt) is a non-SI name also used for this unit (1 nt = 1 cd/m 2). The unit is based on the candela, the SI unit of luminous intensity, and the square metre, the SI unit of area. The candela per square metre (symbol: cd/m 2) is the unit of luminance in the International System of Units (SI). The luminance of the sun itself is approximately 1,000,000,000 cd/m2. While the luminance of starlight is around 0.001 cd/m2, that of a sunlit scene is around 100,000 cd/m2, which is a hundred millions times higher. Note the detail: it measures the total volume of light within a certain beam angle and direction. ![]() Candela is the basic unit of measure of the entire volume of light intensity from any point in a single direction from a light source. ![]()
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