Tunnel lighting is possibly the most technical and critical type amongst all lighting applications. Due to certain risks related to the nature of traffic and constraints of a completely closed and isolated space, successfully illuminating a surface within a tunnel becomes an extremely difficult task. Not only do different zones within a tunnel require a unique illumination approach, but the transition between those zones also needs to be seamless. Even though there are well-defined and strict requirements in terms of luminance and illuminance levels, meeting those requirements is only possible by combining the right design with the right product. Having decades of experience and over a hundred projects under our belt, HEPER's capabilities and expertise in tunnel lighting are second to none. HEPER can work as a one-stop shop with its dedicated team to hand over a successfully illuminated tunnel that will help solve the complex transportation needs of modern cities. Each tunnel project is handled individually starting with design and following by the right product integration. Exceptionally versatile product capabilities help to fine-tune the optics to prosperously illuminate different zones of tunnels. The right material and component selection allow the products to withstand harsh environmental conditions. And the integration with state-of-the-art and energy-efficient control systems becomes the icing on the cake.