A simple light shade designed to fit a ceiling light mount. The circular mount has 3 screws that simply tighten against a rim and the fixture is held in place by a small lip. The widest point of the mount (the lip) is 80mm and the rim (contact point) is 76mm. The shade part has walls 0.8mm thick so you can do 2 walls.

I printed this in vase mode because the lights weren't that bright to begin with. 12 bottom layers to get a stronger lip to mount against but it probably doesn't matter. Pictured is Sunlu matte white PLA @ 0.2mm .