Abstract
The goal of the present research is to determine the criteria of a conceptual and theoretical model of the decorative lighting organization of the architectural environment in the regional conditions of Northern Kazakhstan. The following issues were resolved during the research: 1). the influence of historical, natural, climatic, and socio-economic factors on the decorative lighting formation of the architectural environment were determined; 2). the analysis was carried out and the features of decorative lighting of the architectural environment in the territory of the region under study were revealed (as exemplified by the city of Nur-Sultan); 3). the principles of forming a conceptual and theoretical model of the decorative lighting organization of the architectural environment and its elements were defined. As a consequence of conducted research, a conceptual-theoretical model of the decorative lighting organization of the architectural environment was developed based on retrospective analysis and regional features of Northern Kazakhstan. The optimality criteria of decorative lighting organization of architectural environment were also determined.