From the point of view of architecture and ambience, a building or space should be made visible, its characteristics accentuated and its ambience underlined. This requires detailed information on the architecture and on the overall architectural concept complete with the intended indoor and outdoor effect by day and night, the use of daylight and the permissible energy consumption. This also includes information on materials, reflectance and the colour scheme. In Architectural lighting it’s not primarily about the lighting which emphasises the building structures and characteristic features for a particular perspective, but rather how to create the required aesthetic effect in a space. The question of the building shape, of spatial shape, modules and rhythmical patterns, which can be identified and expressed by light and luminaires - constitutes the central issue.