Sweeny todd and the demon barber of fleet street - 1

The main source of light in this image is the white light from the sun shining through the window.This lights the chair and the two main characters in the scene from the side, creating bright highlights on one half and complete shadow on the other.This reinforces the dark theme of the movie.Also, the lights and shadows direct the viewers eye to various aspects of the scene.So another purpose of lighting is composition.Another interesting thing about the scene is that the only bright color in the scene is the blue shirt worn by the dead character lying on the floor.