signal bulb what is it？
Traffic lights are lights that send appropriate signals to people. They are usually brighter!
Signal lamp: A lamp that emits various signals with light. It conveys messages and shows situations using light of different colors or intermittent light. It is mainly used in transportation facilities, vehicles, or electronic equipment.
First: traffic lights. Traffic lights consist of red, green, and yellow lights. A red light means no crossing, a green light means crossing is permitted, and a yellow light means slow down or a warning.
Stopping at red lights and proceeding on green are the most basic rules of the road. If you violate a traffic light warning, the driver must receive points.
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