Definition, Meaning & Synonyms

lm

noun

/ˈeluːˌɛm/

Definition

Lumen is a unit of measurement for the amount of light emitted by a source.

Examples

Many LED bulbs provide over 800 lm, which is comparable to a traditional 60-watt incandescent bulb.
The light output of a lamp can be measured in lm to determine its efficiency.
When choosing decorations for a space, consider the lm values of the light fixtures for optimal brightness.

Meaning

In the context of lighting, lm refers to the brightness of light that is perceived by the human eye, allowing for an understanding of how much light is produced by light sources such as bulbs or lamps.