The Public Lighting Authority (PLA) is a state-created authority whose mission is to improve, modernize and maintain all street lights in the City of Detroit with brighter, more reliable, more energy efficient lights. The new lights in neighborhoods are 150-watt equivalent LED lights, twice as bright as the 75-watt equivalent High Pressure Sodium Lights that were the standard under the old system. The LED lights are also much more energy efficient than the High Pressure Sodium lights.