Spandrel - light source

the same way that in Gothic cathedrals, where the centroid vaults when met were sandwiched with a filling of the or extension of the ceiling to cover it up, a bell lick filigre structure was added for more ornamentation to the ceiling drawing the eyes tot he ceiling (skies-godliness), the spandrel would become natural light fixtures made of very light material, drawing in light into the structure and placing light on the fake shimmery(gold) archways between the pindrop columns.