Revolutionary Tunable White (TW) trailing edge phase dimmer. Can control both brightness level and light color. For use with SG-LEDDIM luminaires. Until now, Tunable White was only possible with DALI Type 8. With TW LEDDim, only a conventional power supply is required. Control is done manually or via the SG app SG Smart.To change the color temperature, all you have to do is double-click the control knob. The four buttons can be used to save the current setting as a recallable scene. And it can be recalled with a single button press.In conjunction with an SG Smart Gateway, you can also set a daylight rhythm so that the color and intensity change over the course of the day. You can select the standard rhythm or set your own.