One thing that comes to mind now, that I think of it.....@ three years back, I changed all of my ballasts in the fluorescent fixtures in my garage. 36 total, to the new energy efficient ones. That is about the time I started to have problems??!! Now if I was to isolate them, I should see a signal show up somewhere in my system?? I was getting random lights turning on at various times, and recently, have had my door bell going off in the early AM??? I think I'll pull out my 'ol HeathKit O scope and hook it to my AC line and see what may be up???!!!