They will use the light as a media to surprise someone after entering certain room or place. They would turn it off and suddenly turn it back on, it is very easy and efficient. However, if you want to make a more memorable surprise party you should play more on the lamp decorating. It is so because not only that they get surprise, but because it means that they are loved by people who throw a surprise party for them. However, if you plan to make a surprise party to your loved ones, you should consider several things like the concept that can be a pajama party or just a regular party, but one thing that most people use to surprise someone is the light. Interior Design.