This is a frame to mount an E27 socket flush(ish) into a wall or ceiling.

Here is a link to the ones I have used: https://amzn.to/3MSvze8

The socket has to be glued into the frame. I used CA glue. Any 2k will do too. The Fusion 360 File is attached, so the diameter of the hole can be adjusted. A press-fit is possible.

Even though I have used 25W LED lamps and printed in PLA, I did not have any warping and the frame doesn't feel warm to the touch. I never had room temperatures above 25°C though.