1 Make Red Lights buildable
2 When building lights, allow a Sec Access Tuner to store the light
3 Then, when you hit a fire alarm, it connects them
4 When you flip the fire alarm, it causes connected lights to flash on, off, on etc
Boom, buildable FOB et al Alarms.
Doubly cool if you could also do doors this way.
Alternate way to implement, let signallers be addable to doors & lights & fire alarms and do it that way.