What is the use of the floodlight and the scoreboard?

In the Facebook game, Top Eleven – Be a Football Manager, there are a lot of buildings which are really useful and which have a description that says things like “Your players have less risk of getting injured while playing on that field”, for example.

But the scoreboard, for example, just goes with “It’s a key factor for exciting soccer mood”, for the floodlight: “It’s important for late night games and big events”. I can’t figure out if I really need to build those things. It seems that I have to build them if I want to upgrade other buildings but I still don’t know if I can take any advantage of those things.