Most house number plates in Taiwan are placed in not-obvious places, especially where there is not enough light. It is very easy to miss the house number plates, and it wastes a lot of time just trying to get somewhere. Many peoplSe experienced this before. To make it worse, most people turn off their front door lights to save energy. Because of this, this design of security lights is made. This can even be used as road signs, to make sure drivers know where they are going.