The need to turn all lights on street lamps green with LED technology, was part of the design problem even before the project arise.
The desire to give a function to the panel in order to integrate in the structure, led to his becoming a reflecting element, where during the day faces south and evening back to the position where the light will reflect where it is needed, without emitting light pollution.
A conceptual design where only the external structure was developed to be dependent on the mechanical positioning system. The batteries are located at the base of the pole.