This article describes various automatic light control systems. The aim is to analyze existing luminous flux lighting installations with automatic control systems and propose some invention, which is able to eliminate some of their shortcomings. Disadvantages of existing systems are the increased power consumption due to the lack of the luminous flux flexible regulation depending on the traffic on the objects requiring illumination. The aim of invention is to optimize the power consumption by reducing its consumption in moments of significant traffic reduction. The known control systems are supplemented with a counter number of vehicles per unit of time and the controller of functional dependence, which controls the lighting installation luminous flux. The control signal for the lighting system is automatically generated depending on the intensity of vehicles, and sets the light amount as a percentage of the nominal value. The technical result is a significant reduction of power consumption of public lighting systems, the economic result - a reduction of electricity costs.