With SFX, you could probably just have a single fire sound playing if any of the braziers are on, and it'd get the same effect. No one's gonna call you out for having the wrong number unless you're using geospatial audio.
For me, the big sounds I wished for were things like:
- Sound of putting out a torch
- Sound for when a puzzle is completed/a door is opened
- Sound for when you're standing in the light
- And maybe a sound for charging/executing a dash