Luminaires are joined together to become pairs.
Four points become a square.
An example: The arrangement of two square shapes into four round shapes is reorganized into two groups of five according to the law of shape for symmetry.
This principle of sameness also applies when the shapes of a group are not identical but only similar. For example, circles of different sizes are perceived together. Rectangles and squares also sometimes belong to a group due to their squareness or rectangularity.
Within an outline, complete enclosure is not necessary to group the objects within it. The suggestion of a closed shape is sufficient to feign a closed whole.
The arrangement of the points in the ceiling can be joined into two lines according to the law of good shape.
This arrangement is interpreted as two superimposed rectangles.