If you are comfortable thinking Arduino then this is likely the item for you.
The board Dr Haas sells has 4 LED already on it. I'm sure you could replace them with LEDs with a better form factor (i.e. through panel etc.)
It's designed as an arduino shield but you don't need the Arduino.
Basic setup.
- Enable the Hubitat Zigbee pairing
- Power up the Haas board, it will connect with the hub.
- use @ogiewon 's Hubitat driver as a base, modify it if you find other things you want it to do.
It is that simple 
As you read the link further I made a non arduino "carrier" board for the basic cc2530 Zigbee board. Its a little smaller and has some filtering to protect external inputs but it doesn't do much more than Dr Haas' board.
I currently have one operating sending data from my cellar measurements.
I'm working on a second being an ultrasonic sensor to tell Hubitat my car is in the garage or not.
The 3rd is planned for measuring the fuel oil in my heating oil tank.
John
