What is the lighting of the indoor tennis court in GB?

Indoor tennis courts can generally arrange straight fluorescent lamps or install high-intensity gas discharge lamps (such as floodlights) at suitable positions on both sides of the field, or directly install lamps on the indoor ceiling. If the ceiling is used for lighting, this lighting method requires the ceiling to be a diffuse reflection ceiling or a grid ceiling, and the light shines on the ceiling and then transmits light through the ceiling to achieve the lighting effect. This lighting method is not economical. When using light poles in clubs and outdoor venues, especially clubs are different from personal entertainment venues, because clubs need not only good lighting, but also enough brightness at a certain height above the venue to hold high-altitude tennis matches. Therefore, the light pole height of a single outdoor tennis court of the club (official competition) should ensure that the minimum distance between the minimum lamps installation is12m; ; (The two sites are15m; Three courts are 18m), while the light post height of a single tennis court for general entertainment is at least 8m; (2)11m; Three are 14m), and the light poles are arranged outside the sideline. Two light poles can be arranged on each side, or three light poles can be arranged (using floodlights). However, if there are multiple venues, it is not allowed to install light poles between two venues. If the floodlight can't be aimed accurately, or the light intensity distribution is too wide, the lighting device will produce forbidden glare outside the competition venue. At this time, anti-glare measures should be taken or appropriate beam angle lamps should be selected for lighting. CIE42 recommends that the outdoor tennis court be in training mode with illumination value of 300Lux; The horizontal illumination in competition mode is 500Lux. Indoor tennis court 300Lux in entertainment mode; The training mode is 500Lux；; The competition mode is 750Lux. One of the reasons for the different indoor and outdoor illumination requirements is that it limits the brightness contrast between the stadium and the surrounding environment.