There are a lot of modern eletronic devices out there to help with home security. Motion dectors are constantly talked about for outside. Why not for inside also. Rooms that light up if someone is walking around in them do two things: 1) let you know exactly where the problem is, 2) keeps the light behind the intruder and in front of you. A audible alarm can also be incorporated into such a motion activated system.
With home remote monitoring systems cameras can even be placed to scan each lit room from the computer you keep in your bedroom to monitor your security system.
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