The Wallwasher is integrated into the lighting system. It illuminates the tunnel walls very homogeneously, so that drivers of passing vehicles do not get dazzled. The Wallwasher distributes the light in parallel with the road and illuminates the tunnel wall upwards, whereat the light distribution curve is strongly limited towards the middle of the road. This type of lighting ensures that no light ray is disturbingly reflected into the driver’s eye. Depending on the design, both components can be dimmed independently. The light color is variable by the use of colored LEDs.