In this paper, a project to increase the energy efficient internal lighting system of brewery was made. The reference state is obtained by visual field inspection. Calculation of reference and new illumination in the object is performed using the "DIALux evo" program tool and the results are shown in the attachment. Energy savings are presented in relation to the reference state. The aim of this paper was to analyze the energy efficiency measures in the form of a replacement of the lighting system with automatic control systems. Three tasks were set up. The first task with a renovated building is to perform a reference light state analysis. Another task within the model is to replace lighting fixtures with the LED technology and carry out the above-mentioned analysis with the aim of determining new lighting in terms of reducing installed power and meeting the brightness criteria. The third task is the implementation of second task with the addition of a management system with the aim of regulating and optimizing the electricity consumption. For a new artificial lighting solution, it is visible from the calculation results that the values achieved are required by the norms for interior lighting. In order to give an insight into the efficiency of the total lighting installation, a calculation of the LENI lighting energy indicator has been made, and the following amounts were obtained: 10,28 [kWh / m2, year] for the first task, 4,15 [kWh / m2 for the second task and 2,25 [kWh / m2, year] for the third task. It has been found that the LEDs illuminated lighting fixtures with the help of regulation in the third task illuminate the brewery with 78% higher energy efficiency compared to the reference state which makes the replacement cost-effective.