Rail - Tunnel

Many tunnels, such as in Switzerland (Gotthardtunnel) and in Norway (Laerdaltunnel), have a traffic density that is so high that the tunnel cannot close for maintenance.

Lighting maintenance in a tunnel is not only a big inconvenience but also a costly thing.

In these cases, people need a low-maintenance lighting system like  QL.  

A choice for QL is a choice for Proven Technology!