Asymmetrical LED linear wall wash is used for illuminating surfaces evenly. Wallwashing is a highly valued tool in architec tural lighting. The vertical illumination emphasises the walls textures in terms of their physical make up. Its RGBW color changing models render the tower to colorful, attract attention from the visitor in the evening. There will be shadows appears while the gradient light illumiate on the surface, which make it looks three-dimmentional and bigger.