Street lights off the light time with light control time switch which is good
then the lights will be bright, to meet the lighting requirements. The disadvantage is because the dust on the road, easy to receive the signal to cover the surface of the sensor, the signal is not accurate. The advantage of time and space is based on sunrise and sunset time, the basic is dark and shining. The disadvantage is that cloudy rain, lack of light, the lights can not automatically light.
Light control advantage is based on the strength of the light on the road to determine the light is not bright, sometimes even during the day because of rainy days, the road light is low,
Light control and time and space have their own advantages and disadvantages.
