The Standards of Weights and Measures Act,1976
Section 10. Base unit of luminous intensity
(1) The base unit of luminous intensity shall be candela.
(2)The “candela” is the luminous intensity, in the perpendicular direction of a surface of 1/600,000 square metre of a black body at the temperature of freezing platinum under a pressure of 101 325 newtons per square metre.