I made this because I wanted to have just one versatile light with me, and on camping trips needed something that can be hung up in a tent to illuminate everything inside. The flashlight beam alone is a bit too narrow for that, but with a diffuser it's much better.

It doesn't interfere with the LEP beam (last image), or this LEP lens cover - https://www.printables.com/model/670300-acebeam-terminator-m1-lens-cover

I've not tested it for long periods yet - the parts that clip on have enough tension so it doesn't fall off even if I shake it around and it's still easy to take it off, but no guarantees that heat or mechanical creep won't deform it with time. If there's issues I'll try to fix them, but so far it seems fine.

I used normal Elegoo PLA, but if heat becomes a concern this could be done with white ASA.

I use OrcaSlicer and an Elegoo Centauri Carbon - nothing special, just a few print settings to note:

Wall loops: 2 (The entire diffuser part except the bits that clip on should always be 2 lines thick. Quickly go through the layers in preview to double check that it doesn't alternate so you don't get thicker or thinner spots) 

Seam position: Random (so there's no darker line going through the whole print, unless that's preferrable)

No supports needed, prints in about 30min, but if you use thicker layers it can be faster.