This is a cover for an old Westinghouse style 8 inch porch light.

The contractor-grade plastic light cover finally degraded enough that a family of thrushes made their nest in the light fixture and we could not replace or use the light until the fledglings left the nest. 😃 I had to scale the white cover down by 1% for a better fit. I have included the .step files to modify to your needs.

Disclaimer: no birds were harmed or forcefully evicted during the development or deployment of this light cover.