Edison was not the first person to have thought of using electricity for illumination: cumbersome electric arc-lighting had been employed in public Spaces and factories for a number of years.
爱迪生不是第一个想到用电照明的人；许多年来，笨重的电弧灯就在公共区域和工厂投入使用。
2
As a big consumer in electric system, road illumination takes account more than 20% consumption in illuminating electricity, so there is a huge space for energy saving.
道路照明是电力系统的一个大用户，其用电量占据整个照明用电量的20%以上，存在巨大的节电空间。
3
System design of illumination intelligence controller Abstract: The purpose of this paper is to design an intelligence illumination controller which can save limited electric power.