Luminance (Photometry)
Luminance is a photometric measure of the density of luminous intensity in a given direction. It describes the amount of light that passes through or is emitted from a particular area, and falls within a given solid angle. The SI unit for luminance is candela per square metre (cd/m²). The CGS unit of luminance is the stilb, which is equal to one candela per square centimetre or 10 kcd/m².
- Candela per square metre (cd/m²)1
- Kilocandela per square metre (kcd/m²)1×10⁻³
- Candela per square centimetre (cd/cm²)1×10⁻⁴
- Candela per square foot (cd/ft²)0.09
- Foot-lambert (fL)0.29
- Lambert (L)3.14×10⁻⁴
- Nit1
- Stilb1×10⁻⁴