Staircase

Soft light is required in the staircase so that the steps do not cast any hard, irritating shadows. The light should also be glare-free. A combination of ceiling and wall luminaires is most suitable. In our example, landings on the individual floors are illuminated with light from the ceiling. The stairs themselves, on the other hand, are accompanied by wall luminaires. Here the luminaires should have as low installation depths as possible to ensure they are not in the way on the stairs. 

Lighting calculations
Summary
DIALux project