Lumen (Noun)
Meaning 1
A unit of luminous flux equal to the amount of light given out through a solid angle of 1 steradian by a point source of 1 candela intensity radiating uniformly in all directions.
Classification
Nouns denoting quantities and units of measure.
Examples
- The lamp's brightness was measured in lumens to determine its overall luminous flux.
- A single lumen is equivalent to the amount of light emitted by a one-candela source in a one-steradian solid angle.
- The new LED bulb uses significantly fewer watts to produce the same number of lumens as the old incandescent bulb.
- The lumen output of the projector was adjusted to ensure optimal brightness for the presentation.
- The manufacturer's specifications listed the lumen rating of the light fixture to help consumers compare its brightness to other models.
Synonyms
Meaning 2
A cavity or passage in a tubular organ; "the lumen of the intestine".
Classification
Nouns denoting body parts.