When calculating the illuminance of an outdoor tennis court (usually expressed by lux or lumens per square meter, lm/m² for short), we need to consider a number of factors, combined with the specific performance of the lamp, the size of the court and the lighting needs. The following is the calculation process of a point representation and induction:

First, determine the size of the tennis court
A standard tennis court is 78 feet (23.77 m) long and 36 feet (10.97 m) wide.
Second, determine the lighting needs
Determine the level of illumination required according to the purpose of the tennis court (e.g. amateur, official). For example, an official competition may require 500lx-750lx illumination.
Third, choose lamps
Choose lamps suitable for outdoor use, such as LED lamps.
Determine the luminaire’s luminous flux (in lumens lm), which represents the total amount of light emitted by the luminaire.
When selecting a luminaire, pay attention to its beam Angle (the degree of diffusion of light) to ensure that the light can be evenly distributed throughout the site.
Fourth, lighting layout
According to the size and lighting needs of the tennis court, determine the number and placement of the lamps.
Lamps are usually placed in the four corners of the tennis court to ensure that the light can shine evenly throughout the court.
According to the beam Angle and installation height of the luminaire, calculate the spacing and installation Angle of the luminaire.
5. Calculate illumination
Use the following formula to calculate the average illuminance (Eav) of a tennis court:
E
av
​
=
A
Φ * CU * MF
​

Among them:

Φ is the luminous flux of the luminaire (lm)
CU is the coefficient of the luminaire, considering the light utilization rate of the luminaire and the reflectivity of the site
MF is the maintenance factor, taking into account the aging and cleanliness of the luminaire over time
A is the area of the tennis court (m²)
In the case of multiple luminaires, the illuminance contribution of each luminaire can be added together and then averaged.
6. Consider other factors
Consider the impact of glare and choose the right lamps and installation angles to reduce glare.
Consider energy saving and environmental protection factors, choose energy-efficient lamps and intelligent lighting systems.
Consider the life and maintenance costs of the lamps, choose the quality of reliable lamps and suppliers.
Vii. Summary
According to the above steps and calculations, the illumination level of the outdoor tennis court can be obtained.
It should be noted that the above calculations are only theoretical values, and the actual illuminance may be affected by a variety of factors, such as weather conditions, luminaire performance, and site reflectivity.
Therefore, in practical applications, it is recommended to carry out on-site measurement and debugging to ensure that the lighting effect of the tennis court meets the needs of the competition and use.