41d649c1_s_and_Measures_Act___Law_Delta__Definition
[0] 6. [Basic Unit] candela [Symbol] cd [Definition] 
the unit for the measurement of luminous intensity, being the luminous intensity, in a given direction, of a source that emits monochromatic radiation of frequency 540 x 1012 hertz and that has a radiant intensity in that direction of 1/683 watt per steradian
Law:Weights and Measures Act - Law Delta
Definition