A:Answer Not sure...but you won't need the dimmer switch, as it's super simple to dim them in the app.
I use Siri -- and I know you can use Alexa, too -- and say "Hey Siri. Make the Living Room lights 30%."
You can get it granularly dimmed. 11%, 28%, 56% or whatever.
I hope this answers your question. Good luck. I think it's an awesome product.