What is Tunnel Lighting?Tunnel Lighting Design DefinitionTunnel lighting design is about creating a lighting plan that helps drivers’ eyes adjust to the tunnel environment for safety and comfort.Adaptability CriteriaLighting must transition gradually from high to low levels to help drivers’ eyes adjust smoothly when entering or exiting the tunnel.40 m Length RuleThe first 40 meters of a tunnel should be designed to let in daylight and ensure visibility of objects inside.Classification of Inside