light source
General term for anything that emits light, from lamps to the sun. Used in technical and everyday contexts.
This room doesn't have enough light sources.
太陽は地球上で最も重要な光源だ。
The sun is the most important light source on Earth.
point light source; positional light source
light source state
directional light source
standard candle; standard light source
ambient light source
lighting model
spot light source
workstation light source
Compound of 光 (light) and 源 (source). The reading こうげん is the standard on'yomi for both characters.