The idea behind ‘Artefact’ is an artificially created object in a single copy, having some specific property. But in this case, since this is an applied item, it is not a painting. This is not a sculpture it's an ‘Artefact’. The amazing property of colored glass of a stained glass window is it interacts with, with any light source. It could be the sun, it could be the moon, it could be a lamp. And depending on where the light source is the look and feel of the ‘Artefact’ changes completely. But it always works with light. That is, it is light and color working together.