on/off and level mirroring

[Duggel]

Hi,

In my room I have dimmable ceiling lights via a Fibaro Dimmer controlled by a monostable wallswitch.
In this same room I also have some led-strips controlled via a Fibaro RGBW controller.

I would like to make the Fibaro RGBW-controller to mirror the Fibaro Dimmer (on/off and level).
If I understand correctly, the on/off-status can be mirrord by setting de Led-strip as sub/slave to de ceiling lights, but this only controls the on/off status, not the level (or does it?).

What is the best way to get this working?