LED tunnel lights have become a new type of lighting fixture developed in recent years due to their outstanding advantages such as long life, low energy consumption, high luminous efficiency, and controllable illumination angle, which are commonly used in road tunnel lighting. Due to the particularity of tunnel lighting, the arrangement of LED tunnel lights is also different from conventional lighting. Many drivers may have the following questions:

1.Why are the LED tunnel lights at the entrance and exit of the tunnel relatively dense?

This is determined by the special structure of the tunnel and the physiological structure of the human eye. Because the tunnel is a semi-enclosed structure, there is a big difference in brightness between inside and outside the tunnel. When a vehicle enters or exits the tunnel, the human eye needs to adapt to time. That is, "adaptation lag" occurs. When vehicles enter the cave during the day, due to the sudden drop in brightness, people’s visual response is lagging to form a "black hole effect", which makes it difficult to distinguish the situation in the cave; when the vehicle exits the tunnel, a "white hole effect" is formed, causing an intense glare.

In order to avoid the excessive difference in light intensity between inside and outside the tunnel and short-term visual obstruction to human eyes, the LED lights at the entrance and exit of the tunnel are required to be dense, so as to reduce the light intensity difference between the outside and inside of the tunnel during the day and ensure the safety of the driver.

2. Why are the LED tunnel lamps arranged in two rows in the tunnel?

Normally, the LED lamps in the tunnel are often designed in two rows, which is also out of consideration for the driver's driving safety. Generally speaking, the LED tunnel lights are divided into two rows with two lights, which are located on both sides, and the top lights are opposite to the ground, so that they can illuminate the space without reflection.