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.