Answer:
Take for example the Netflix series "Peaky Blinders", the first episode of the first season, minutes 25-26. Setting of the series: England 1919.
Step-by-step explanation:
During this minute, we see a woman who enters a bar asking for a job as a waiter and singer. While the rest of the scenes are dark, reflecting a decadent society and death around them, this particular scene is fully lighted. This woman is white, blonde and has light eyes too, which helps the scene be even brighter. The difference in lighting is due to her apparent purity, honesty and kindness. She is the exact opposite of what is going on in the streets: death, injustice and decadence.
I would not do anything different because the contrast is necessary to make the audience understand that she's (at least by now) a good woman with a kind heart, and the extreme brightness around her in this scene creates that effect.