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Laerdal Tunnel - Norway

The longest road tunnel in the world extends 24.5 km between the cities of Laerdal and Aurland in western Norway. The tunnel’s construction lasted five years and was completed in 1998. The reliable QL Induction lighting was chosen to lighten the world’s longest tunnel 24 hours a day. A total of 1.410 QL induction systems have been installed and represented a life time of 96.000 hours. All QL induction systems are replaced in 2008-2009.