I made this ceiling lamp for my kitchen. It's based on a hexagonal pattern.

White filament creates a focused beam. Use transparent filament for a more room filling effect. 

The ceiling mount is designed for 3 M3 heat set inserts, but only needs a single screw into the ceiling to hold the lamp. The strain relief for the cable uses a small zip-tie. Just thread it through the holes and use it to pull the cable tight.

The holes are 42mm in diameter for the socket. I added versions without the hole, so you can use the slicer to make bigger or smaller ones.