ABSTRACT
There are considerable differences between spectral composition as well as light intensity and natural daylight from the compass points. As a function of this, interiors with windows facing north or south are always differently illuminated. Simplified, it can be said that the former are lit by daylight (sky light) and reflected light while the latter are lit by direct sunlight and reflected light. The diffuse skylight in the north-facing room caused a great chromatic increase in bluish, greenish and pinkish colours. It was an unexpected yet an indisputable result that pinkish rooms increased most in chromaticness in this direction. Greenish and pinkish rooms shifted towards bluish hues. Bluish rooms, on the other hand, showed another tendency c. Yellowish rooms decreased in chromaticness and shifted from yellowish towards a greater amount of green or red attribute. Greenish-yellow rooms shifted towards greenish, and yellow rooms shifted the same way in decreasing light.
