Are there built-in timers available that can be installed in the wall as a one piece unit that includes a wall receptacle? I have a very unique, wall hanging Christmas tree picture made out of women's costume jewelry in a picture frame that has lights on the tree. As the light cord is behind the frame, I would like to be able to plug the lights into a wall receptacle behind the picture that has a built-in timer that I can set when I first hang the picture at Chrismastime so it can turn on and off without having to manually plug it in and then unplug it later every time I want to use it as I now must do. Any suggestions? Looked at many timers on-line but cannot find a built-in wall recepticle unit. Need some expert help. Thanks so much for all your informed answers.