Birthday is one of the most celebrated day that most people have in their lives. They celebrate birthday to appreciate their lives and one of the way to express their gratitude that they are born and for all the blessings in their lives. 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. Interior Design.