A new smart city control system (SCCS) for street lights will mean greater energy and cost efficiency, plus less greenhouse emissions. The system essentially dims the lights when they are not being needed
Urban street lighting is very inefficient. The lights operate with 100% light output all night, requiring vast amounts of power, which also means greenhouse emissions. Yet during most of the night lights are not needed, and most of the energy is wasted. The excess light also affects human circadian rhythms and confuses plant growth: astronomers call it light pollution.
Further details: Smart City lighting