ᐅ Mounting canisters and sockets for GU10 LED spotlights

Can anyone recommend good recessed housings and adjustable sockets for GU10 LED spotlights?

I thought the builder takes care of the preparation? The fittings don’t care whether they are adjustable or not.

And here’s a tip for your next question: Who knows good installation frames? It can be important to know the installation size (diameter) of the housing and the hole size required by the installation frame.

We installed the Spelsberg IBTronic XL H 185 F junction boxes. Unfortunately, I can’t provide more details yet, except that they made a good impression.
The cost is about 25 euros on Amazon. Ours cost around 40 euros including installation.