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.
| Unit | candela |
|---|---|
| Symbol | cd |
| Quantity | luminous intensity |
| Defining Constant | luminous efficacy |
| Defining Resolution |
CGPM Resolution 5 (1967) |
| Unit Type | SI base unit |
