Light LED when Armed

Is there a way to setup a zone or an output to provide voltage when the system is in the armed state (home or night) so that I can wire up an LED light as a visual reference at key exits?  I have tried to setup with triggerableModes but can't get it to work.

I am not sure about the LED part with the power, I would assume you need to accommodate the power output of the zone. Then configure it as a simple switch in Homebridge, and then in HomeKit set up an automation that associates the state of the Security System accessory with the state of the switch accessory in HomeKit.

Again, I don't know anything about the voltage, resistors, or LED requirements for the zone. @andy