The analysis of energy savings in public lighting in this study, based on a real example from a part of the city, demonstrates the potential savings, both in terms of energy and economics, that can be achieved through the implementation of modern technologies. During the reconstruction of the public lighting system, with the aim of achieving economic and energy savings, it is necessary to comply with the legal provisions prescribed by the HRN EN 13201:2016 standard. The first chapter outlines what belongs to the public lighting system. The following chapter explains the role of public lighting, the legislative regulations that govern public lighting, presents the physics of light and how it passes through the human eye, and finally, mentions and explains some of the issues associated with public lighting. The third chapter describes the methodology of energy audit of public lighting, which is part of the methodology of energy audits for buildings. All the steps of the methodology are described, with a particular focus on the measurement of lighting parameters, which is presented using a real example of a road and pedestrian zone in the following chapter. Measurements of illuminance and luminance of the roadway were conducted in the urban settlement of Sjenjak, on one of the roads and on the walkway. The determination of measurement points was done in accordance with the HRN EN 13201:2016 standard, and linear measurements of illuminance were also conducted on the walkway and roadway, before and after midnight, providing insight into the regulation of public lighting. In addition to the measurements, modeling of the same road and walkway was done in the Relux software in order to compare the results of illuminance and luminance of the roadway. In the same chapter, an analysis of energy savings resulting from the reconstruction of the public lighting system in the Novi Grad district was also conducted. Finally, this study explains the system of energy savings obligations, how trading takes place within the system, the expected savings of the public lighting system in Croatia, and the experiences of other European Union countries that have previously implemented the system of energy savings obligations.