Switch / Button / Double Button / Dimmer / Eltako

However you turn it. For operating multiple push buttons, you need a central point from which dimming is done.

From this perspective, the dimmer should be installed directly in front of the spotlights, where the control lines come together. And not in the flush-mounted boxes behind the push buttons.

Again, for me as a layman. For each circuit or, in this case, for each area of ceiling spotlights that we want to switch individually, there is a cable above the ceiling. You would then have to install the dimmer there, and then you could also use push buttons? What is the difference if it is installed directly in the flush-mounted box?

Now we don't want a dimmable double rocker switch, but a dimmable double push button. .

Since the above suggestions are not feasible:
Install another flush-mounted box to install a double push button as two individual push buttons, each with an individual flush-mounted dimmer?

Warning, some flush-mounted LED universal dimmers (e.g. from Gira) require an additional neutral conductor (usually blue) for some LED lights.

Or:
For the Eltakos in the full control cabinet, retrofit an "extension" to the control cabinet?

Thank you for the suggestions. Unfortunately, there is no room for an "extension," and the electrician said that 5 wires are needed here, but we have only installed 3. And it is too late for another flush-mounted socket AND it would not be an alternative anyway, since we already have 2 x 5-row side by side at this spot, and that would be quite a lot. But thanks for the ideas.

There must still be some possibility.

Your electrician should set up the circuit like this, then it will work. As I have already described, the appropriate dimmer (whether it is from Eltako or someone else) must be installed behind all switches and before the lights.

Thank you very much! I have now forwarded this accordingly. Does "behind the switch" mean that these can also be installed upstairs in the attic, directly in front of the lamps? Because there is no space for 2 push-button dimmers in the box. Or is there a flush-mounted double push-button dimmer?

It means that all switches with which you want to dim a lighting circuit are connected in parallel and the switch output is connected to the input of the [Tastdimmer].

In this case, the [Tastdimmer] is usually outsourced and not squeezed into the flush-mounted boxes but is either in the false ceiling or in the control cabinet ororor.

The dimmer is then also wired in such a way that it gets its own 230V connection.