Prima dimmer with less restriction

I run the HomeMatic radio dimming actuator in connection with a commercial push button and FHEM. The dimming actuator I installed in a junction box. It fits here in addition to the existing cable and wire nuts just into it, so that the lid can be put back.

From FHEM surface of the dimming actuator can be dimmed any (I use 3x 4.5 watts dimmable LEDs), there are settings possible from 1% to 100%. However, when dimmed over the wall switch, the actuator switches off completely rather early (bez. Late one), so you do not come down under 15% (felt). I think that's a shame, because I want these settings have a look, for example, to watch TV just like. Currently I use the smart phone on hand to herunterzudimmen the light when I want it as dark. Because of this limitation, I prefer from 1 star in rating.

It should be emphasized that the dimmer copes well with the low wattage of the LEDs. Previously, I had an older dimmer the LEDs could not turn down so far.