17-118

candela per square metre

SI unit of luminance

Symbol: cd·m-2

NOTE1 This unit was sometimes called the nit (symbol: nt) (name discouraged).

NOTE2 Other units of luminance:

metric, non-SI: lambert (symbol: L), 1 L = cd⋅m-2;

non-metric, non-SI: footlambert (symbol: fL), 1 fL = 3,426 cd⋅m-2.

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