[ˈljuːmɪnəns]

Definitions

1. noun

the state of being luminous; the quality of giving off light

“The luminance of the city skyline at night is breathtaking.”

2. noun

the quantity of light falling on a surface, measured in candelas per square metre (cd/m²)

“The luminance of the computer screen was set to 200 cd/m².”