This is an outdoor light shade. It fits into a standard 2 1/4" light mount with three (3) screws.
I didn't want to alter any electrical and thus, I just added onto the existing 2 ¼" mount that had 3 screws in place; the shade mounts into it.
It was printed in clear PETG with full supports on the Prusa XL with .8mm nozzle and .55 layer height.
The author marked this model as their own original creation.