Fusion Optix Luminance vs Illuminance: the sky is illuminance whereas the light reflected of the causeway in the foreground is luminance

Luminance vs Illuminance

What is the difference between luminance vs. illuminance? When talking about light, one of the most confusing terms will be luminance and illuminance.  They are more or less used incorrectly by people, sometimes even by the people in the industry. Luminance Luminance is the density of luminous intensity in a given direction and falls within…