MR11 or MR16 for DIY reflective collar

Anyone here try halogen reflector narrow angle spot type MR11 or MR16 for DIY reflective collar? Could these be used once the “socket” was cut out leaving a hole. What type of reflective material, aluminum or dichronic would be better?

Yeah i tried that several years ago - without any good result- its just they are designed for an emitter thats inside not on the border of the reflector and the modding would take lots of your time - at the same time there are realy great and cheap china reflector based spots- you just have to swap their COB chip and the driver and voila- youll have a great spotlight

This is what i did a year ago with my home 38 pcs spotlight: now they are running with Bridgelux high CRI( 97) SSL chips and selfmade drivers- you cant buy that even now, noone produces a real high CRI spotlights, even if they do the price would be….

I diyed my whole house and garden lighting this way btw

This could work, in spite of i `ve found mine on Ali ways cheaper….as logn as i can remember they were 1.9$ or something with a terrible cob chip included

Think we are on the wrong page and maybe I should have phrased it differently. I was referring to something like a wavien collar using the reflector of a MR11 or MR16.