I've followed STEP 2.2.8 + added a few other mods for quests and clothing, but nothing that should be affecting lighting. I'm also using ENBoost but have no ENB installed.
I'm got an issue where caves and dungeons are super bright in some areas. Usually, where sunlight is coming in through a hole in the cave or braziers are around. Naturally, it should be brighter, but this is just ridiculous.