luminance.

A measure of light leaving a surface in a specified viewing direction.

Use it for

Words that belong together

• surface luminance
• luminance contrast

On the page

The display adjusted its luminance to the surrounding light.

Usage notes

Primary category: sensory / description. Forms: Usually uncountable; no ordinary plural in this sense. Legacy lexical fields mirror sense 1 only. Use numbered sense fields for all meanings. Established modern English lexical item. No separate regional spelling or grammatical inflection entry. Writing functions: description. Commonness: uncommon.