Standards of Weights and Measures Act, 1976
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 meter of a black body at the temperature of freezing platinum under a pressure of 101 325 Newton’s per square meter.