SI REFERENCE POINT
Version: 1.0.0 beta.105 , last update: 2026-03-04

candela

The value of the new candle is such that the brightness of the full radiator at the temperature of solidification of platinum is 60 new candles per square centimetre.

This definition is valid from 1948-01-01 to 1967-10-12
Unit candela
Symbol cd
Quantity luminous intensity
Defining Constant luminous efficacy
Defining Resolution
CIPM Resolution 1 (1946)
Unit Type SI base unit