This has a specific formula. According to the required illumination value and the length, width and height of the room, the number of lamps can be preliminarily determined. Then, according to the calculated number of lamps, the power density is used for verification, and the required load density value is enough. If there is Tianzheng Electric, it also has its own calculation of the number of lights.

The specific formula is as follows:

e = nφUK/A

n = EA/(φUK)

These include:

φ-luminous flux lm

N-number of light sources

U utilization coefficient

A-working face area m2

K-lamp maintenance coefficient