Traffic signal principle solar street light-litelsolar manufacturer

Red, yellow, and green traffic lights can be described as silent 'traffic police'. Traffic lights are internationally unified traffic lights. A red light is a stop signal and a green light is a go signal. At the intersection, cars from several directions gather here, some have to go straight, some have to turn, and whoever goes first is to obey the traffic lights. When the red light is on, it is forbidden to go straight or turn left, and the vehicle is allowed to turn right without obstructing pedestrians and vehicles; when the green light is on, the vehicle is allowed to go straight or turn; when the yellow light is on, it stops within the stop line at the intersection or the pedestrian crossing line and has continued to pass; When the yellow light is flashing, warn the vehicle to pay attention to safety. At the earliest, the light color setting was only red and green. Later, after improvement, a yellow light was added. The red light means stop, the yellow light means preparation, and the green light means pass. The reason why these three colors are used as traffic signals is also related to people's visual structure and psychological response. The human retina contains rod-shaped and three types of cone-shaped photoreceptor cells. The rod-shaped cells are particularly sensitive to yellow light, and the three types of cone-shaped cells are the most sensitive to red light, green light and blue light respectively. Because of this visual structure, it is easiest for humans to distinguish red from green. Although yellow and blue are also easy to distinguish, because the eyeball has fewer photoreceptors sensitive to blue light, it is better to distinguish between red and green. It can be seen that the traffic lights are not set arbitrarily. Scientific theoretical basis According to optical principles, red light has a very long wavelength, has a strong ability to penetrate the air, and is more noticeable than other signals. Therefore, as a signal for prohibiting passage, green is used as a notification signal because of the difference between red and green. The largest, easy to distinguish (red-green color blindness is a minority after all). In addition, color can also express some specific meaning, to express hot or violent, the strongest is red, followed by yellow. Green has colder and calmer connotations. Therefore, people often use red for danger, yellow for warning, and green for safety. We mainly produce and sell outdoor road, square, station, wharf, courtyard and indoor industrial and mining lighting fixtures. Varieties are: solar street light, led street light, single-arm light, double-arm light, high pole light, combination light, garden light, landscape light, lawn light, buried light, solar light, led light, led lamp holder, solar panel, Fountain sculptures, various traffic sign poles, traffic lights, power poles, and supporting ballasts and triggers, and also produce light-controlled and time-controlled switch boxes.
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