Vented Ceiling Light Shade

My sealed light fixtures with Glass shades/diffusers were cooking my LED light bulbs, severely shortening their lifespan. I designed this one to be closed enough to shade/diffuse the light, but open enough to allow free airflow, keeping things cool.

The one pictured in the thumbnail was printed at 0.3mm Layer height, from transparent PETG. This just barely fits on the 210mm deep build plate of a prusa I3 mk3.

The resulting part felt fairly delicate, so I added a lip to the design, but have never printed that version so beware it is untested, though I see no reason why it shouldn't work out fine.