With Active/Standby Smart switch mode you can control two scenes that both have the same luminaires in them.
Create two scenes, one scene that should turn on when the controlling luminaire is powered ON (i.e. the Active scene) and one Standby scene that is turned on when the controlling luminaire powered OFF. This mode can be used for example with motion sensors.
Example: When motion is detected the luminaires go to full light level and when there is no motion the luminaires are dimmed to 30%.
Note that the luminaires in the two scenes must always be powered i.e. They cannot be connected to the same power switch as is used to activate the device configured with Active/Standby Smart switch mode.