A modern stadium must have a good lighting environment to ensure visual effects and meet the lighting requirements of the audience, participants, and television broadcasts. Then, do you really know how stadium lighting is designed?
1、 Four-corner layout
The four corners of the stadium flood lighting fixtures are arranged in a centralized manner in conjunction with the light poles at the four corners of the playing field. Until today, many stadiums have four corner lighting facilities. Four poles are set in the four corners of the venue. The tower height is generally 35-60m, and narrow-beam lighting fixtures are often used. This type of arrangement is suitable for football pitches with no shelter or lower pitches. This method has low lighting utilization, difficult maintenance, and high cost.
The suitable position of the lamp post is shown in Figure 1 below. The angle between the bottom stadium led lightand the center of the venue and the ground should be not less than 25° to determine the height of the lamp post. Therefore, the distance between the lamp post and the center of the site is different.
The height of the pole is also different, see Table 3; the midpoint of the court’s baseline is at an angle of 10° outwards with the court’s baseline (15° angle with TV broadcast), and the midpoint of the court’s perimeter intersects with the edge at an angle of 5° outward. The triangle area formed by the extension line after the point is the position where the light pole is arranged. By adopting the projection of various beam angle projectors, a suitable illuminance distribution can be formed on the site.
However, today’s television broadcasts require higher and more uniform vertical illuminance, and the required angle of light incident on the far part of the venue is far less than the prescribed limit. The effect of the higher brightness obtained by the use of a large-scale gas discharge lamp, together with the high height of a conventional lighthouse (a type of lamp post), inevitably causes excessive glare.
The disadvantages of this type of four-corner lighting are: the visual changes in different viewing directions are relatively large and the shadows are dark. From the perspective of color television broadcasting, it is indeed more difficult to control the glare by satisfying the vertical illuminance in all directions.