This is a iKea style Lampshade that i designed in Fusion360. The Lampshade is designed around the iKea "Sekond Cord" set, which you can get for approx $8 from any iKea store. Having said that, you can still use any standard 40mm diameter bulb holder (not from iKea even). Most of them should work perfectly fine.
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Instagram is @tar1qali
Happy 3D Printing :)