General lighting requirements: The middle section is the longest part of the tunnel. Drivers' eyes have adapted to the low-brightness environment inside the tunnel, so only a uniform and soft basic brightness needs to be maintained, and high-power strong

Addressing the black hole effect: When a vehicle enters a tunnel from a strong light environment outdoors, it takes a relatively long time for the human eye to adapt from bright to dark. If the brightness at the entrance is insufficient, Drivers will perc

Solving the white hole effect: When a vehicle exits from the dark environment inside a tunnel to the bright outdoor environment, the human eyes will experience the "white hole effect" due to the stimulation of strong light, making it impossible to see the

Achieving human eye visual transition: The core function of the transition section is to gradually reduce the brightness, allowing the Drivers's eyes to smoothly transition from adapting to strong outdoor light to the normal brightness of the middle sectio