I was looking for a ceiling fan bulb shade that gave me an ‘industrial look’ like the wire baskets. This is my first try to see how it looked. I needed a shade which was held on by 3 screws.  Most store shades are glass and flowery looking. I made this from measuring a glass shade dimensions.

If you print this large open side down, you do not need supports.

There can be stringers between the slots after printing.  A quick run through with a flame clears them out nicely, otherwise they look like cobwebs lol.

I printed with PETG at 20% infill and it appears sturdy enough to use. There is about 10mm clearance between the bulb and the shade when installed. Should work fine for LED bulbs and possible fluorescents.