This mob farm is completely enclosed and no torches are present. Here is a picture. There are no torches in the hole in there it gets to light level 0, but for some reason it is still lit up.
MC-147540
Lighting issue in clearly not lit places.
Resolved
Duplicate
2
UHHH no
(Unassigned)
Unconfirmed
Minecraft 19w13b, Minecraft 19w14b
Retrieved
I've encountered both random light in the desert at night from sand, & random darkness on sand during the day.