| NOUN | quantity | illumination unit | a measure of illumination |
|---|
| Meaning | A measure of illumination. | |
|---|---|---|
| Narrower | footcandle | A unit of illuminance on a surface that is everywhere 1 foot from a point source of 1 candle |
| lambert, L | A cgs unit of illumination equal to the brightness of a perfectly diffusing surface that emits or reflects one lumen per square centimeter | |
| lux, lx | A unit of illumination equal to 1 lumen per square meter | |
| phot | A unit of illumination equal to 1 lumen per square centimeter | |
| Broader | light unit | A measure of the visible electromagnetic radiation |
| Spanish | unidad de iluminación | |
| Catalan | unitat d'il·luminació | |
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