This is a light shade/diffuser designed for my GU10 ceiling lights, it might fit yours also, if not you can just scale it accordingly, my lights are LED and I would NOT reccomend using this on a halogen type bulb due to heat issues (although i have not tried this), the object "lamp socket new" has little clips which attach to the outer part of the fixture inbetween the fixture and the ceiling, so you have to pull the fixture down about 1mm so you can get the clips in there, "lamp socket new" has a lip for the "disc" to sit on.
The print is in 2 parts to save time and supports, also the "socket" can be used with multiple "discs" depending on your mood, although you would have to take the entire thing down before you can install a different "disc".
Any questions just ask, this hole thing should take no longer than 2 hours to print and looks pretty cool i think, i have other "discs" designed and will upload them if anyone asks. :)
I have been using this all around my house for a few weeks now and have had no melting while using LED bulbs.