When illuminating large-area facades, it is important to think on a large scale not only in terms of simulation and visualisation. Creative solutions are also required for the luminaire mounting locations - thus enabling the challenges of the building dimensions to be mastered.
Efficiently presenting and showcasing large buildings in urban areas requires special concepts, methods and tools. To externally illuminate monumental landmarks in their entirety would require a disproportionate amount of energy. The alternative is to concentrate on the effective surfaces and architectural features within the urban space - as with illumination of the Milan Cathedral. For pedestrians for example the lighting in the lower area is relevant. The upper floors and an illuminated roof make a building visible on the skyline.