The runtime is the time that the dimmer needs to dim from 0 to 100%. This setting is ONLY valid for commands sent by radio. When the external button is pressed locally, the dimming speed is always the same. For example, if you enter a time of 20 seconds, the dimmer will take 20 seconds when switched on by scene or remote control. On if a percentage value is to be approached in a scene. e.g. 50%, this would then take 10 seconds accordingly.
