It allows you to schedule games at night in your time zone.
And the final video board upgrade allows you to see game highlights in near HDTV quality.
LOL

As a newby, when I read this comment about floodlights are required for important games, I thought that maybe I couldn't play Champions League next season because of that

Anyway, it's not totally useless. With this I synchronized my next academy players to be ready the 2nd day of the new season (it's the opposite from giving tokens to speed up buildings).