Anything is possible, just got to get it all wired in etc.
like most allarms flash the indicators when armed/disarmed others keep the indicators on for say 5 seconds.
Just got to change it to your headlights/interior light/neons etc etc
for example, im going to be fitting some LED strips above the passenger and driver footwells, but only want them to come on when i open the doors,just have to wire them to the sensor which puts the interior light on when you open the doors......
It is possible, but could be a complicted job