... ) F(50Hz/60Hz) DC(12V 24V)Power efficiency >0.9LED lighting efficiency LED90Lm/WLuminaire efficiency >90%Color rendering index Ra >80Correlated ... , yards, inhabitancy areas, factories and some other places where need lighting. , ,,,,,,Features Use 4 pieces of single powerful LED (30W-50W ... meet the demands of the The Standard of City Road Lighting Design, it show the advantage of LED light in a ...