Architectural Bureau Betillon / Dorval-Bory took ona commitment to the reconstruction of 20 square meters. meters The complexity of the task assigned to the team was the shortage of not only square meters, but also natural lighting in a single room. Despite this, the project authors managed to create a harmonious, comfortable space that meets most of the requirements of modern urban life. It is the layering of several light streams that determined the visual geometry of the design. The basis of this decision was a deep study of the spectral characteristics of various sources of illumination, the most important of which can be called the color rendering index. Depending on the value of this parameter, some devices are capable of displaying the object's palette as accurately as possible, while others can nullify its perception with human vision. The idea of the authors of the project was to use lighting devices with a different color rendering index to create a complex structure within this absolutely rectangular volume. The private zone of the studio includes a sleeping place andthe shower stall is lit using sodium lamps with the lowest color rendering index. At night, this space will seem completely monochrome, not quite real. This effect can be observed at night on city streets, when in the light of lamps it is almost impossible to distinguish the colors of passing cars. On the other side of the two-meter partitionthere is a kitchen and a mini living room, which are lit with lamps with almost the maximum value of the color rendering index. This is quite logical, given that in this part of the apartment the hosts must receive guests, work and prepare food. Both zones are illuminated independently of each other, which allows you to create amazing optical effects that change the perception of the architecture of space. It is noteworthy that the design of the apartment as a wholepronounced extremely simple and neutral. It is not at all burdened with color and an abundance of details, so that nothing but the composition generated by the play of light would influence the perception of the particular structure of this interior. Below is a plan of the apartment, consisting of an almost perfect rectangle of living space and the adjoining room with a bathroom. And this is a graphic visualization of the artificial lighting of the apartment. Of course, light and color cannot change the physical parameters of an object, but they effectively influence how we see it. Doesn’t consciousness ultimately determine our world perception?