ABSTRACT
Per-capita consumption of artiŽcial light averages about 20 megalumen-hours per year globally but varies widely. North Americans consume about 100 megalumen-hours per year on average. By comparison, Chinese consume about 10, and Indians consume only 3, megalumen-hours per year [3]. Given global demographic trends, lighting efŽciency improvements not only offer signiŽcant energy savings in developed countries, but more importantly, the opportunity to contain large growth in lighting energy use in less developed countries.
