So, you can at first turn every lamp off, but instead of suddenly turn the lights back on, you can turn a decorated lamp at first that will make the effect more dramatic. The lamp decorating can be decorated on a tree or on the wall with various color of light. After the candle is blown, than you can turn the lights back on again. 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.