I can sympathize! When I built my house 5 years ago, I had strobe fire alarm lights installed. Turned out one of them was defective. Some 3 or 4 months after moving in, I was rudely awakened by the strobes going off and I freaked out, thinking there was a fire. Searched the whole house and gathering cats along the way, and .... no fire. It kept on for many nights after until I finally called the electrician who installed them. Finally got a good night sleep's after that. But I'll never forget that first night when my heart nearly jumped out of my chest like that!