In the end I used 12 rows of 60 LEDs.

Everything is working as planned.

I could end the project here but there is so much more I can do with this.

Coming soon:
Integration of Mycroft (the kickstarter has ended but the product is not yet shipping)
This will enable voice control.

Server control. The Arduino is permanently connected (USB) to the home server.
I already have terminal control of the Arduino, planned is an API (daemon) on the server so anything can interface.

Will post cct diags and parts list soon.