The garage light is on

At my Girlfriend's house in Pisa, I found this really cool feature put together by her Dad. When one of the lights in the garage is on, this orange light turns on in the kitchen. Really handy because those garage lights you normally turn on as you enter the house, and a lot of times they get left on. With this, you can see if they're on from the inside and turn them off from the inside. It's also nice because if they're both on you know that someone is in there.



  1. is that done with motion and light sensors or by wiring?