Just purchased some ceiling rings designed to cover bad cuts around my kitchen high hats. These rings are completely customizable and arrived ahead of their promised date. You need to know in advance that these ranges will give your lights a stepped look which worked for my application.
I ordered a clear acrylic disk with a cutout circle in the center. My order was filled quickly and arrived quickly. It was packaged extremely well and arrived in perfect condition. The cutting was exactly what I ordered and fits my table top perfectly. I highly recommend this company.
I am an Audiovisual Design Engineer. I had to mount pendant speakers above a drop ceiling with the bottom of the speaker's level with the bottom of the drop ceiling. I found the Goof Rings offered by 1800Ceiling after a quick search on the internet. I ordered seven custom size rings to cover the cut holes in the ceilings. They worked out perfect! Not for lights but for speakers.