What is the utilization factor for calculating the general illuminance of building electricity?

The utilization coefficient is not that big. The utilization coefficient is determined by the air ratio of the room, the ability of the wall to reflect light and the height of the lamp. The maximum is 0.7, usually 0.5. Unless your home is designed to put lights on! The maintenance coefficient can be 0.8, 0.7 and 0.6, and the outdoor awning can be 0.65.