Illumination of the ‘art walls’ also has positive effects on the perception of the architecture. Vertical lighting improves orientation within the architecture and increases the impression of brightness. This highly influences people's perception of safety. In addition, the illumination of the art walls sets striking highlights in a rather dark environment. A high level of illuminance can be achieved in such situations with just a few watts. Striking viewpoints are created, also visible even from a distance, and the attention of visitors and travellers is specifically directed. The specification was for lighting that would guarantee maximum visual comfort for passengers. Kona projectors offer perfect glare control thanks to their special housing shape and high quality optical components.