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  1. 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!

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