Definition, Meaning & Synonyms

lumen

noun

ˈluː.mən

Definition

A unit of measurement for the amount of light emitted by a source in all directions.

Examples

LED light bulbs typically produce more lumens than traditional incandescent bulbs.
A standard candle produces about 12 lumens of light.
When choosing outdoor lighting, consider how many lumens are needed for safety and visibility.

Meaning

Lumen refers to the brightness of light that is visible to the human eye. It measures how much light is produced by a source, such as a light bulb or the sun, that is perceived by an observer.