Generate a spacer ring to put around an existing or new recessed light.

Enter the parameters as illustrated and render the ring. Do remember that if your light is smaller than the hole it is covering that the springs will put pressure on the ring and possibly deform it over time... the solution would be to make the "Inner_Thick" setting thicker.

Obviously you can print anything up to the size of your BED.

The lights I tested ran at about 60 degrees C after being on for several hours... as a reference point.

I recommend using customizer as the options will be clearly shown

If you are working with converting a 7" can I have posted adapters to use 6" LED lights here https://www.thingiverse.com/thing:5153686