>>48943608It means the source of light is absent, it's just a light that comes out of nowhere.
Like for example, look at this, where there were Gwyndolin in DS1.
You have those light is in the middle, making those circles on the ground, but nothing generates those light, the windows at the side of the room are just black, and there is a bulb of light which is just the reflection of the light there is in the middle between two.
Another example is the cathedral of Sullyvan which is illuminated by nothing, because the moon is behind it.
