Why do so many arenas have horrible lighting?

[Minnesota]

I've noticed this a couple times.

Rexall Place has oddly dark lighting on TV, and SAP Center has blue-ish tinted lighting on TV... Always thought the latter was intentional because it's the "shark tank."

 

[Macbanan]

I read somewhere that they saved over $500,000 in lighting costs in 93-94 by cutting electricity to the building and shining a flashlight at Mark Messier's head.

Oh man that made me laugh.

Some arenas are a bit too dark in my opinion. You might not care if your light settings on the TV is put way up, but if you set it so darkness in movies are pitch black then its a bit annoying.