This might have just been a dream, but i’m 99% sure it’s a movie.

I remember two scenes from the movie, one was set in a corridor (possibly a subway platform), the walls and floor seemed to be made out of bathroom/kitchen tile, and a person was running down the corridor away from some invisible force that was making the fluorescent lights on the ceiling go out one-by-one.

The other scene was set in a house, same story. The lights were going out inside the house, and I remember clearly that if anybody touched the shadows, then they disappear or are injured. I also remember a woman with a blonde Marge-Simpson hair due.