SQI finished tracking test on lightings of Panlongling Tunnel of Shangsan Highway in Zhejiang Province recently.

    Panlongling Tunnel started lighting transformation for energy saving by using LED lightings instead of traditional lightings since 2013. SQI tested lightings in entrance, transition and intermediate section of both tunnels. SQI has tracking tested the lighting condition of Panlongling Tunnel regularly for several years. Panlongling Tunnel is located in Tiantai County. It has two sections, one is 940 meters and the other is 2445 meters.