wondering how i can turn this artificial light off that's underneath my merc(s) at night.

https://www.dropbox.com/s/6ny8qgyz1uu45pq/Example%205%20-%20Light.png?dl=0

I'm using r7623 + AFS v4.49, but i've had this problem with many different builds over the years before.

Here's the kicker, though; i distinctly recall being able to turn this light off (underneath and around Buns, it explicitly says brightness 22 in the link).

"Merc Lights during Movement" in the Options menu is turned off.