Application guide for Tunnel Lighting

Tunnel lighting design must balance safety, comfort, energy efficiency, and compliance with regulatory standards as below of critical requirements:

1. Brightness and Illuminance Levels

Zone-Specific Illumination:

Tunnels are divided into zones (entrance, transition, interior, exit) with

distinct lighting requirements. For example:

Entrance/Transition Zones: Higher brightness to mitigate the "black hole effect" and ensure driver adaptation .

Interior Zone: Uniform illumination to maintain visibility without causing glare or fatigue .

Exit Zone: Gradual reduction in brightness to avoid the "white hole effect" .

Glare Control:

Luminaires must minimize glare through precise beam angles and asymmetric

optics to focus light on the road surface .

2. Energy Efficiency and Sustainability

High-Efficiency Luminaires: LEDs with high luminous efficacy and minimal light spillage are prioritized.

For example, guided optics technology improves efficiency by 50% compared to conventional designs .

Smart Controls:

Systems reduce energy consumption by 30–60% through dynamic dimming and occupancy-based activation .

3. Emergency Lighting and Safety Protocols

Emergency Power Supply:

Uninterruptible power supplies (UPS) ensure lighting remains operational for ≥30 minutes during outages .

Evacuation Guidance: Escape routes and exits require illumination levels 3–5 times higher than adjacent lanes .

Green flashing exit signs with ≥150 cd/m² intensity guide evacuations in smoke-filled environments .

Driver Physiology:

Metrics like pupil area change rate, heart rate variability, and gaze duration are used to evaluate comfort. Optimal brightness (e.g., 2.5 cd/m²) balances

safety and comfort .

Practical Implementation Tips

Adopt Modular Systems: Scalable designs with plug-and-play components simplify upgrades and reduce downtime .

By integrating these requirements,

tunnel operators can enhance safety, reduce energy costs, and comply with evolving standards. For further details, refer to the SunLumin Application example.