There was once a product called the "Clapper", where you could enter a room and clap twice and a lamp would turn on. This was an amazing product, for the time, but its no longer 1995, you can now control a light switch from across the country, from your phone! When integrated with other smart devices you can control and ever monitor your home to not only save money, but also to make it look like you are home when you are on vacation, or time your holiday decorations.