The article discusses the role and functions of light in the space of modern theater buildings outside the auditorium and stage space. The architectural and structural factors of the formation of the lighting environment in modern theater buildings are determined; trends and features of the functioning of light in the space of modern theaters are revealed. The influence of the architectonics of buildings on the nature of the illumination of theatrical spaces is established. The experience of the formation of the lighting environment of theater buildings on the example of modern domestic and foreign theaters is analyzed.

Based on domestic and foreign experience, an analysis of the natural light filling of the sacred space of Modern Greek Catholic churches in Ukraine and abroad. Similarities and differences in the formation of the light environment of the modern church, compared with the traditional one, have been establish. The architecture of Modern Greek Catholic churches in Ukraine significantly influenced by the traditions of architectural formation of other branches of Christianity. This influence manifested primarily in the organization of their lighting environment. In Modern Greek Catholic churches, there is a top light from the domes in the cover, but its share in the total flow of daylight significantly reduced. Due to the large stained glass windows in the walls significantly increases the overall illumination of the interior of the temple. Uniform arrangement of windows in the outer walls equalizes the light on the inner surfaces. Contribute to the creation of uniform illumination of surfaces used in the decoration of walls of light colors with the same brightness in the field of view. These factors indicate the convergence of the light composition of the interior of Greek Catholic churches with the interiors of Protestant churches. At the same time, partial (horizontal or vertical) or complete glazing of the walls in the altar, installation of large stained glass windows at full height in the side walls, installation of light lanterns, mostly in the roof over the altar space, bring together modern Greek Catholic churches their space with modern Catholic churches. Modern Greek Catholic churches contain many techniques of light-spatial composition that not related to the tradition already developed by the system of Ukrainian national attributes, and rather reflect the authorial style of an architect.

Scenography is a special kind of fine art and a visual aspect of a theatrical spectacle. Its task is to form the space of the stage with the help of plastic, painting and light-colour effects, which are inextricably linked with each other and theatrical action. In a theatrical performance, it is a way to immerse the spectator in something special - the atmosphere conceived by the director, created by the theatrical artist, director of light and actors. The purpose of the publication is to try to reveal the role of light and colour in the stage decisions of Yevhen Lysyk, to establish how these means formed a unique painting style of the artist, which turned his scenography into an independent component of opera and ballet performances. For the scenography of Y. Lysyk, a characteristic method is the use of optical illusions. He uses architectural and light-coloured optical illusions as a means of enhancing the perception of forms and space of scenography. Such optical illusions include the law of light irradiation, illusions of magnification of vertically arranged elements in comparison with horizontal ones, colour contrasts, subjective perception of colours (chromatic stereoscopy), etc. His stage solutions differ in their colour scheme. In most performances, the artist's scenography dominates the structure of theatrical action. The play of colour contrasts and bright spots on the huge monumental canvases causes the audience a reflexive desire to open their eyes, thereby sharpening the hearing and "turns on" the imagination. The subjective tendency to colour testifies to the inner world of the artist and at the same time to the way of his thinking, the peculiarities of his creative manner. The following research methods were used: visual, comparative, philosophical, artistic, stylistic and iconographic. Analysis of individual stage solutions Y. Lysyk allowed us to draw a theoretical conclusion: light and colour play an important role in shaping the creative concept of an outstanding theatrical artist, and contribute to the formation of his unique style and manner of performing artistic and monumental stage solutions. The theoretical assumption is made that their integral performance, in the context of composition, perspective system, proportions, ways of using light and colour approaches the basic principles of construction in iconographic images of the Christian tradition.