I just moved into a new house and don't know how to change this flush mounted light:
I've tried removing the piece at the bottom and that didn't drop the light as I would have expected. The other lights in the house seem to be Murray Feiss lights and the closest one I could find isn't the same.
The glass seems to extend up into the metal ring at the top and I am unable to rotate the glass separate from the ring. There appears to be some insulation or foam above the metal ring.
I have tried rotating the whole thing (it moves but doesn't loosen), prying at the top ring (it appears there is a screw that goes down from the ceiling plate that seems to be holding it up, but that makes no sense.