I like Gunner3456's layout using motion sensors. All lights in my house come on, except the bedroom. I have indoor security cameras that allow me to scan the house from the laptop in the bedroom. As far as going out to clear the house and using a gun mounted light. I do not use that tool, nor will I go out iin search of any bad guy. If he shows up on any camera I relay the information to local LEOs. If BG(s) get away with any property I turn the images over to my insurance company. If the lights and dog don't clear the house maybe the BG is after me. In which case sitting still and waiting strikes me as best course of action. But then it is just me and the dog in the house most of the time.