A couple years ago I got moved to a new office where I could hear an awful humming noise from the light ballasts in the ceiling when the lights in a showroom/lobby downstairs were turned on. None of other dozen people in my office could hear it.

I feel like I wasted a bunch of perfectly good political capital at work in my fight with building management to get them to fix the lights. They finally replaced them with ballast-free LEDs after six months.