A couple weeks ago, I re-watched The Shop Around the Corner and noticed some significance in the lighting in the final scene.
Mr. Kralik and Miss Novak, the two main characters, irritate each other at work but anonymously exchange letters through which they've become fond of one an-other. Eventually, Kralik discovers the true identity of his "dear friend." In the final scene of the movie, a conversation between Kralik and Novak, Kralik feigns that he has met Novak's correspondent and invents unpleasant details about him. Novak had been looking forward to marrying him, but with each detail that Kralik fabricates, her spirits sink lower.
As they're talking, Kralik is closing up the shop and turning off the lights. The increasing darkness visually matches and perhaps even heightens the sense of Novak's growing disappointment.
