Mum's favorite reading lamp "sprung a leak" in its plastic shade due to thermal stress and every time my little niece was at their place she was always: "granny, there's a hole here!" and stuck her finger into the ugly sharp hole.

Printer to the rescue!

The shape is slightly different to print super easy and without supports. It has a 29mm hole and fits on a classical lamp thread secured with the lamp's original nut. If printed in PLA, I strongly recommend using it with an LED lightbulb.

Bonus: when lit up it (accidentally, mind you) strongly resembles SpaceX's Falcon 9 Merlin engine nozzle :D

A2Delta

No

No

0.2

100% or none

The wall thickness is consistent 2mm, so with extrusion width of 0.5mm and 2 perimeters, you don't even need any infill (or set it to 100%).