The nit (symbol: nt) is a non-SI name also used for this unit (1 nt = 1 cd/m2).[1] The term nit is believed to come from the Latin word nitēre, "to shine".[2]
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.[3] Typically, monitors calibrated for SDR broadcast or studio color grading should have a brightness of 100 cd/m2.[4] Most consumer desktop liquid crystal displays have luminances of 200 to 300 cd/m2.[5]HDR displays range from around 400 to 2500 cd/m2.[6]
^The symbols in this column denote dimensions; "L", "T" and "J" are for length, time and luminous intensity respectively, not the symbols for the units litre, tesla and joule.
^Standards organizations recommend that photometric quantities be denoted with a subscript "v" (for "visual") to avoid confusion with radiometric or photon quantities. For example: USA Standard Letter Symbols for Illuminating Engineering USAS Z7.1-1967, Y10.18-1967
^ abcAlternative symbols sometimes seen: W for luminous energy, P or F for luminous flux, and ρ for luminous efficacy of a source.
^"ITU-R BT.2035-7"(PDF). A reference viewing environment for evaluation of HDTV program material or completed programmes. 2013-08-13. Archived(PDF) from the original on 2022-12-20. Retrieved 2022-12-20.