In This Project We show when air come then windmill generate electricity and that electricity indication show by Red and Green LED bulb , And that electricity store in battery and we use there LDR Sensor for control Street Light On / Off For , So LDR On the Street Light Only Night Time So Our Electricity Power Save because Only Night Time Our Street Light Glow , and In This Project We show First Windmill and we show substation for store windmill generate power then that power step by step go to tower to DP Transformer and then go to street light , This is Best Project For transmission and distribution of electrical power , This is Best and Innovative Low Cost Electrical Engineering Project ,