I want to dim my lights if it is left on after certain period, but I cannot figure out with Tapo automation.  I have S505D Dimmer switches.

1. If the light is left on for 30 minutes,

2. Dim it to 50% of brightness.

I do not think it's possible with the Tapo programming, but perhaps I just haven't figured it out yet.  I rather put this automation / smart action in Tapo app, but if it is not possible, I will try to Alexa.

Thanks