Most street lamps have a sensor to trigger it on and off. When it gets dark, the light turns on. When it's light, it turns on. Lasers can turn them off at night because the beam is so bright.
Street Lights stay on in the night as they have a light detection unit on the top, if the sensor falls under shadow it turns on.
Street lamps are typically powered by electricity and contain a light bulb within a protective casing. They are controlled by a timer or light sensor that turns them on and off at specific times or in response to changes in natural light. The light bulb emits light to illuminate the street or sidewalk below.
The light turns on when you flip the switch, and it turns off when you flip the switch again.
It turns a lamp on and off.
The Clapper
a light sensor is movement is made this triggers off the sensor which turns of the light
a light sensor is movement is made this triggers off the sensor which turns of the light
a light sensor is movement is made this triggers off the sensor which turns of the light
if your referring to that small white light on the bottom of each signal that comes on and goes off, that is an indicator for the police to know if someone just ran a red light. notice it goes off when the light turns green.
The reley connection is loose and the wiring contact is on and off...
he dumb like me
Have you charged your psp lately? It could be out of battery IT DOES NOT DO THAT!