https://www.benweilighting.com/professional-lighting/led-stadium-light/high-powered-light.html

Additionally, external factors such as electromagnetic interference (EMI) can affect the performance of stadium lights. EMI can be caused by nearby power lines, radio or television transmission towers, and even lightning. Proper grounding and shielding can help prevent EMI and ensure that the lights remain stable and flicker-free.

Finally, inadequate installation or outdated technology can also cause flickering stadium lights. Old, worn-out lights or outdated fixtures can fail to handle the demand of modern lighting technology, resulting in flickering and other issues. Installing newer, more efficient lighting systems can help prevent this problem and provide better illumination of the playing field.