Whenever I set up a house for a client, I installed motion sensor lights in every room, hallway, stairwell except the master bedroom. That works quite well and makes intruders very nervous. I put led's on each one, so I could tell if one had been turned off/unplugged. Occassionaly, I would bridge a ding-dong on certain ones.
The hallway one worked fine until the cat learned to turn it on when he came in at night.