Liu Yi tunnel is located in Fu Ning expressway section of Yunnan province. The full length is 2524 meters with 3 lanes of the twin-tunnel; This project has adopted SPARK’s LED tunnel light 40W/50W/100W totally 1159 units, which has improving 90% lighting effect and energy saving rate by more than 75%. The use of the secondary optical anti-glare effect can bring comfortable driving environment in the tunnel.