The bottom panel of these shades is actually convex
in shape and has a 7 inch opening in the middle to go
in and change the bulb. They are from the Art Deco period
and this convex bottom panel is due to that influence on
this Industrial design. There are three wire extensions in the
interior of the shade holding the panel on. It can be removed
to clean by simply unscrewing 3 small screws. Wonderful
Loft Fixtures. Great Large Kitchen Island Fixture, the metal
construction is Stainless Steal and Brass.