noun
illuminance; intensity of illumination
Technical term for the amount of light falling on a surface, measured in lux. Used in lighting design, photography, and workplace safety standards.
オフィスの照度は500ルクス以上が推奨されている。
An illuminance of 500 lux or more is recommended for offices.
この部屋の照度を測ってください。
Please measure the illuminance in this room.