Meaning: This describes a scenario where wavering firelight provided illumination in the darkness of the night, creating a warm and inviting ambiance.
Choice of Words: "Flickering" means unsteady or wavering, "flames" are the hot, glowing part of a fire, "lit up" means illuminated, and "night" is the period of darkness between sunset and sunrise. Combined, they evoke the image of unsteady firelight casting illumination during the night.