Currently, the rationing of daylighting of buildings is based on numerous and detailed studies of electrical lighting, which were conducted in the second half of the twentieth century by lighting specialists. These studies mainly concerned flat objects of distinction. Three-dimensional objects with their own and falling shadows require further research. Daylighting requires taking into account even more factors that affect it. The analysis of factors that need to be taken into account in the norms and relevant research are discussed. It is indicated that without taking into account these factors, standards cannot accurately contribute to the creation of a comfortable internal environment in buildings and increase their energy efficiency. Among these unaccounted-for factors, such as the distribution of brightness across the sky, corresponding to the conditions of statistical clouds for a given construction area, taking into account the volume of objects of distinction and the influence of their own and falling shadows on the conditions of visual work in the light field, as well as the influence of saturation with daylight in the room, are the most important. The results of research in this area conducted at the National Research University MGSU and other research institutes and universities are presented. Given the huge size of our country and the variety of climatic conditions, in which it is located, the task of linking calculations and designing daylighting of buildings is very difficult. Therefore, researchers in this field need to develop a system of rationing and accounting for the light climate, in which taking into account the brightness of the sky on the one hand would reflect local conditions, and on the other hand would be quite simple.
svetovogo polya i uluchsheniye usloviy zritel’noy raboty s ob”yomnymi ob”yektami razlicheniya] // ACADEMIA. Architecture and Construction Journal of RAASN, 2009, # 5.
2. Solovyov, A.K. Application of the theory of light field for the design of natural lighting in buildings [Ispol’zovaniye teorii svetovogo polya dlya proyektirovaniya yestestvennogo osveshcheniya zdaniy] // Industrial and Civil Engineering [Promyshlennoye i grazhdanskoye stroitel’stvo], 2010, # 3, pp. 40–41.
3. Egorchenkov, V.A., Solovyov, A.K. // Designing natural lighting systems for buildings using spatial characteristics of the light environment [Proyektirovaniye sistem yestestvennogo osveshcheniya zdaniy s ispol’zovaniyem prostranstvennykh kharakteristik svetovoy sredy] // Industrial and Civil Engineering, 1983, # 7.
4. Darula, S., Kittler, R. The New Method to Calibrate ISO/CIE General Skies. Modelled in Artificial Skies // Light & Engineering, 2021, Vol. 29, # 1, pp. 15–23.
5. Solovyov, A.K., Nikonova, E.V. Combined lighting: Requirements for automatic control and efficiency of its operation [Kombinirovannoye osveshcheniye: trebovaniya k avtomaticheskomu upravleniyu i effektivnosti yego raboty] // Svetotekhnika, 2022, # 6, pp. 80–84.
6. Solovyov, A.K. Physics of the environment (Textbook)[ Fizika okruzhayushchey sredy] // ASV Publishing House, Moscow, 2018, 341p.
7. Solovyov, A.K., Stetsky, S.V., Muravyeva, N.A. Comfortable lighting environment with natural and artificial lighting. Determining its characteristics using subjective expert assessments // Light & Engineering, 2018, Vol. 26, # 3, pp. 124–131.
8. Molchina, N.A., Magera, T.N. Method for evaluating the quality of natural light environment in rooms with side natural lighting based on the criterion “room light saturation” // Light & Engineering, 2023, Vol. 31, # 6, pp. 23–34.

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• standardization
• daylighting and combined lighting
• contrast of brightness of the object and background
• light field
• cylindrical illumination
• average spherical illumination
• brightness of the sky
• three-dimensional objects of distinction
• saturation with daylight
• Landoldt rings