1 Prohibited lighting area

　　There is a misunderstanding about the lighting of the football field. There are some areas where sports lighting is prohibited. The main areas are 15° (with TV broadcast) or 10° (without TV broadcast) on both sides of the botm line and the range below the 60° elevation angle behind the goal. From the 2002 FIFA (FIFA) standard,  the 2007 FIFA standard, and then  the 2011 FIFA standard, after many revisions, the requirements for prohibited lighting areas have become more and more stringent, as shown in Figures 1  3 . my country's standards have also adopted FIFA's standard requirements and have continued  this day.

　　This requirement of FIFA is  prevent sports lighting from interfering with athletes, especially goalkeepers, and affecting the normal performance of the game. The starting point is correct, but the measures are questionable!

　　2 It is better  prohibit lights from interfering with athletes

　　You must know that it is the light that interferes with the athletes' normal competition, not the location of the lighting! Therefore, the lighting area and the projection angle of the light are more important.

　　For track and field stadiums and football stadiums, the above prohibited lighting areas can be illuminated. A common practice in engineering practice is  turn off the lights in this area in the football game mode and only use it during track and field games. Therefore, no light is projected in the field, and it will not affect the normal competition of the athletes.

　　For football stadiums, sports lighting fixtures can also be installed in this area. However, the aiming angle of the lamp should be avoided  project in the area that can affect the athletes' competition. There are mainly the following two situations:

　　The corner kick area is forbidden  arrange the lights (as shown in Figure 1). If the lamps are arranged, it is necessary  avoid projecting the lights  the large restricted area and surrounding areas;

　　The picture above shows the new changes in the FIFA2020 standard. Although the standard has not yet been promulgated and implemented, after the research and application of the 2018 AFC AFC and the 2019 UEFA UEFA standard, the implementation of the FIFA new standard is within easy reach. Lamps can still be installed in the areas where the lights cannot be installed in the picture, but the projection point of the lamps must be outside the restricted area. The lighting in the restricted area is projected by lamps installed in other areas.

　　The projection angle of the lamps in the area behind the goal cannot be projected in the restricted area and the field, but can be projected on the field outside the botm line, so that it will not interfere with the athletes.

　　In the picture, the pink area means that lights are not allowed within the range where the elevation angle outside the restricted area is less than 60°;

　　The yellow area can be lighted outside the restricted area greater than 60°;

　　Green lamps are allowed  be installed in a range greater than 45° outside the restricted area.

　　In the project, the sports lighting lamps behind the botm line can be shifted  the east and west sides, as shown in the green lamp part of Figure 5, which is conducive  achieving better results.

　　3 Application

　　In fact, FIFA allowed the placement of sports lighting fixtures in the aforementioned prohibited lighting areas during the 2014 FIFA World Cup in Brazil, but it has strict requirements on the projection angle of the fixtures. On the basis of the research and application practice of the football federations of all continents, the introduction of the new FIFA standard will be a matter of course.

　　It is not difficult  see that the FIFA standard supports the use of a circular layout for football field lighting, provided that the projection angle and light control must be designed well, which also subverts the tradition.

　　Conclusion: It is a misunderstanding that the traditionally forbidden lighting of the football stadium is actually a misunderstanding. It is better  forbid lighting projection or passing through the area that affects the normal game of athletes.

　　Shenzhen  Lighting is a lamp manufacturer focusing on R&D and production of LED landscape lighting and outdoor lighting. It has 9 years of experience in military industry lighting services. It is located in Shenzhen Baoan. Its products cover: stadium lighting, LED sports lighting, stadium lights, LED stadium lights, High bay lights, high bay lights manufacturers, LED workshop lights, workshop LED lights, tunnel LED lights, LED tunnel lights, LED wer chandeliers, street lights, LED workshop lights, LED squares, lamps, LED lights, high pole lights, wer chandelier, LED Street lights, LED lamps, LED high pole lights, etc. For many years, our company has always put product quality in the first place. At present, the company has passed the ISO9001 international quality certification system, and the products have passed CE, ROHS, 3C and other domestic and international certifications and inspections. We insist on making cusmers feel free  buy and use LED lights. Philosophy and mission,  Lighting [Chongde Shangshan is the source of the original] look forward  cooperating with you for a win-win situation!