From what I can tell, since this is the only room to have this lighting issue for me in all of the mod, and I use realistic lighting overhaul with purity, is that all the little candles, are giving off their own light source, and the striping is caused by multiple light sources hitting the character. Each black stripe is the ending of a light source and start of another.
I offer this potential fix that might help: The room for realistic lightning overhaul, is extremely dark at night. This picture was taken during the day. I would like to suggest removing the light sources from all the candles, and put maybe a goat horn chandelier on the roof of the room and use only 1 dim unified light source on it. A single light source vs many smaller ones, might make the stripes vanish