https://the-gadgeteer.com/2018/03/17/retrofit-your-existing-downlights-with-smart-iphilips-hue-kits/
I have an old-style downlight in my foyer, and I wanted a smart bulb for it. I saw a lot of retrofit kits for recessed lights with the light source and trim
philips hueretrofitexistingdownlightssmart
https://www.siemens.com/us/en/products/services/digital-enterprise-services/retrofit-modernization-services/retrofit-kit.html
With our Retrofit Kits you can replace converters by yourself. Safe the costs of a service technican and configure and install the converter easily.
retrofit kitssiemensus