Just like movies go through TV studios with all their displays set up correctly (Hopefully) … same happens on sports and kids shows and everything else. TV studios do not change out their equipment simply because it is sports. It’s still D65 … and the light output rules still apply. Unless you can pin down the environment that people are watching sports in … (good luck) … the rules do not change. Still a reference mode for reference viewing and a day mode for when the environment is variable and when the material does not matter.
Light output rules are still the same. Use the rule of thumb … if it hurts your head to hit it against the wall, you should stop. 🙂 (And it isn’t set your TV to 35 FL either.)
Regards