illuminance
/ɪˈluːmɪnəns/the luminous flux incident on unit area of a surface. It is measured in lux 照明 ( symbol: Sometimes called illumination)
noun [抽象名词] [光]照度；照明度（等于 illumination）
It refers to the specified average illuminance value on the lighted surface. 规定的被照明表面上的照度平均值.
