The illumination (lux) calculation method of rugby field involves a number of factors, the following is a clear summary of the illumination calculation method of rugby field based on the information provided in the reference article and relevant lighting design principles:

First, determine the lighting standards
Amateur games: For informal rugby games or training, the illumination requirement is relatively low, usually between 150-300lux.
Official games: For international or professional level rugby games, the illumination requirements will be higher to meet the visual needs of players and spectators, usually between 500 and 750lux.
Second, choose lighting fixtures
Lighting type: Select lighting suitable for rugby fields, such as LED lamps, because of its high efficiency, energy saving, long life and other characteristics of the favored.
Luminaires parameters: Consider the luminaires’ luminous flux (in lumen lm), beam Angle, installation height and other factors to ensure that the light can be evenly distributed throughout the site.
Third, lighting layout
Light strip arrangement: For the rugby field, light strip arrangement is a common lighting method, that is, lamps are arranged on both sides of the field in rows to form a continuous light strip. This way can provide uniform lighting effect and meet the requirements of color television transmission.
Layout details:
For Class A and super rugby fields, the length of the light strip is generally not less than 180m, and the projection Angle of the lamp should not be less than 25°.
Taking into account the impact of athletes and referees to avoid glare, when there is a television broadcast, the space on both sides of the bottom line within 15° Angle should avoid lighting.
When there is no TV broadcast, the space within 10° Angle on both sides of the bottom line should also avoid arranging lamps.
4. Calculate illumination
Theoretical calculation: Using lighting design software or manual calculation method, according to the luminaire’s luminous flux, beam Angle, installation height and arrangement, calculate the average illuminance and illuminance uniformity of the site.
Considerations: In the calculation process, it is necessary to take into account the reflectivity of the site, the maintenance factor (MF) of the lamp and the light utilization ratio (CU) of the lamp.
5. On-site debugging
Lighting test: After the actual installation of the lamps, on-site lighting test is carried out to ensure that the illumination of the venue meets the needs of the competition and use.
Adjust the lamp: According to the test results, the Angle and height of the lamp are adjusted to achieve the best lighting effect.
Six, precautions
Glare control: When designing and arranging lamps, attention should be paid to the control of glare to avoid discomfort to athletes and spectators.
Energy saving and environmental protection: Choose energy-efficient LED lamps and adopt reasonable lighting control methods to reduce energy consumption and operating costs.
To sum up, the illumination calculation of the rugby field is a comprehensive consideration of a number of factors, the need to determine the lighting scheme and lighting layout according to the specific field conditions, competition needs and use.