The average illuminance over the reference surface at the end of the complete maintenance cycle 灯具在维护周期末期在参考表面上的平均照度。
Note : the maintained illuminance is the minimum value to which the illuminance is allowed to fall 注:维持照度是照度衰减所允许的最自小值。
Simplified method for predetermination of illuminances inclosed areas and related classification of luminaires 光源的封闭地段照明度和相关分类预测的简化方法
Testing of fibre optic elements - part 10 : determination of illuminance and acceptance angle of cold light sources 光纤元件试验.第10部分:冷光源光照强度及有效视角测
Experimental results show that the system can realize good focus in a wider range of illuminance 实验结果表明，在较宽范围的光照度条件下，应用该系统均能获得良好的调焦效果。
The polarization grade of three lamps for the laboratory and the polarization error of two illuminance meters are measured 测量了实验室用的三支灯的偏振度及两台照度计的偏振误差。
Note : the orientation of the surface may be defined , e . g . horizontal , vertical , hence horizontal illuminance , vertical illuminance 注：被照表面的方向需注明。如：表面方向为水平或垂直时，可以分别得到水平照度或垂直照度。
Illuminance level on a surface . the hydraulic equivalent is represented by the amount of water falling onto the surface in question , within the time unit 重要?何?推? , ?照度的定? ?得, ?是很有用的可以去了解光在空?中的?散情形。
Illuminance level on a surface . the hydraulic equivalent is represented by the amount of water falling onto the surface in question , within the time unit 两个重要几何学推论,从照度的定义获得,这是很有用的可以去了解光在空间中的发散情形。
The paper derives out the proper power supply voltage of city road lighting according to the illuminance and life span character at different voltage level 摘要根据路灯在不同电压下的照度及寿命特性，推导出城市道路照明灯具的最佳供电电压。
