Tunnel lighting is not merely about brightness; it is about managing human visual physiology. As vehicles transition from bright outdoor sunlight into a darkened tunnel, the human eye experiences a phenomenon known as the "Black Hole Effect". Without immediate, progressive, and highly calculated visual transition zones, a driver is effectively blinded for critical seconds—creating extreme safety hazards. Designers use the CIE 88-2004 guidelines to structure lighting systems into five distinct zones: the Access Zone, Threshold Zone, Transition Zone, Interior Zone, and Exit Zone.
In the Threshold Zone, the luminance must match a specific percentage of the ambient outdoor luminance ($L_{20}$ method) to prevent visual disorientation. Achieving this requires high-output, glare-free, and symmetrically distributed lighting systems. Conversely, the Interior Zone demands low energy-consumption, uniform light, and long-term durability. Our high-performance LED tunnel lights utilize advanced asymmetric optical lenses that direct light directly to the road surface, maximizing the utilization factor and minimizing the veiling glare ($T_i$) to less than 10%, ensuring compliance with international road and safety codes.
Furthermore, tunnel structures are subject to high humidity, vehicular emissions, dust, corrosive cleaning agents, and constant mechanical vibration from traffic. Therefore, any lighting fixture deployed in these zones must be engineered to withstand rigorous environmental stressors. Standard commercial fixtures decay rapidly under these conditions. True industrial-grade tunnel lighting relies on IP66 or IP69K sealing, robust copper-free aluminum housings, chemical-resistant glass covers, and specialized anti-vibration mountings to guarantee uninterrupted operation for over 100,000 hours.
Yangzhou OneAll Lights Co., Ltd. is a professional manufacturer and exporter specializing in outdoor lighting solutions. Established in 2003 and located in Yangzhou, Jiangsu Province, China, we have over 20 years of experience in the design, development, manufacturing, and supply of high-quality lighting products for customers around the world.
With continuous investment in advanced manufacturing technology, our factory is equipped with modern production facilities, including CNC bending machines, automatic submerged arc welding systems, laser cutting equipment, electrostatic powder coating lines, fluorocarbon painting workshops, and precision testing instruments. Supported by multiple automated production lines and a skilled technical team, we are able to provide efficient production, stable quality, and reliable delivery for projects of all sizes.
Innovation and quality are the driving forces behind our growth. We have established an experienced R&D team dedicated to developing energy-efficient, environmentally friendly, and intelligent lighting solutions that meet the evolving needs of global markets. From product design and engineering to manufacturing and quality inspection, every production process is carried out under strict quality control standards to ensure excellent performance, durability, and long service life.
Our company has obtained ISO9001 Quality Management System Certification, ISO14001 Environmental Management System Certification, CCC, CQC, CE certification, and various product testing reports, demonstrating our commitment to international quality and safety standards.
Over the years, our products have been exported to customers across Southeast Asia, the Middle East, Africa, Europe, South America, and many other regions. With rich experience in international projects, we also provide flexible OEM and ODM services, offering customized solutions tailored to different customer requirements and application scenarios.
Our state-of-the-art manufacturing plant in Yangzhou leverages automation, robotics, and rigorous testing protocols to deliver zero-defect lighting products.
Tunnel lighting is evolving into highly integrated smart systems. Here is our technological blueprint for next-generation transportation infrastructure.
Real-time adjustment of interior tunnel luminance based on outdoor photometers. System interface integrates with DALI-2, 0-10V, and PLC (Power Line Communication) protocols to minimize the "black hole effect" and optimize power efficiency.
Utilizing high-purity PMMA/PC lenses designed with asymmetrical light distributions. Projects precise, counter-beam lighting (CBL) setups to maximize obstacle visibility and heighten driver safety indices.
Integrating environmental sensor suites directly into the luminaires. Monitors traffic speed, density, pollution levels, and humidity metrics to dynamically configure the tunnel's visual envelope.
Expression ways demand instant visual transitions at speeds exceeding 100 km/h. Our system solutions deploy high-lumen density linear configurations at the Threshold Zone, combined with smart PLC loop controllers. This system continuously samples outdoor light levels, matching interior illuminance to adapt drivers' retinas smoothly, preventing sudden deceleration and potential pile-ups.
Optical Setup: Counter-beam asymmetric configurations, providing high road surface luminance ($L_{av} \ge 4.5\text{ cd/m}^2$) and exceptional longitudinal uniformity.
Urban systems face continuous operational profiles with frequent stop-and-go conditions. Low heat dissipation capacity requires fixtures with exceptional thermal performance. We use high-conductivity aluminum casings paired with multi-channel heat sink paths to limit LED junction temperatures to under 75°C, ensuring the fixture retains 90% of initial light output (L90B10) after 100,000 operational hours.
Smart Control: Time-table scheduling and motion sensor dimming interfaces integrated with the centralized Municipal SCADA network.
Global highway agencies demand absolute compliance with testing parameters. Yangzhou OneAll Lights products undergo exhaustive laboratory tests. We provide comprehensive certifications including CE, RoHS, CCC, CQC, CB, and detailed LM-79, LM-80, and TM-21 degradation reports from accredited testing agencies.
For corrosion resistance, our coatings meet ISO 12944 C5-M classification standards, protecting aluminum structural elements against high salt concentration and sulfur-heavy atmospheric environments typical of coastal tunnels and vehicle exhaust areas. Our mechanical design engineers support global consulting groups by compiling full DIALux simulation analyses, structural wind-loading calculations, and customized bracket mounting configurations to ensure seamless on-site engineering execution.
OneAll Lights