Tradfri on/off Switch with dimmable Lights


i´m new to Mozilla IOT and i´m very happy with this. But there is a question about the Ikea Tradfri Switches.

I connected the switch as a thing and also the light. So now i added a rule for on and another rule for off. But how can i dimm the lights? I can´t find any solution so far? In ioBroker it was easy possible, so i was wondering why i can´t find it here.

Can you please help me.
Regards Luca

Assuming they have a brightness property, you can set the brightness as a rule output.