The main infrastructural parts of urban intersections are road marks, traffic lights, and lighting. Signaling - except for metal signs - is always realized as intelligent systems. In case of lighting systems, a trend for including intelligence into the luminaries for remote control and diagnosis applications can also be recognized. The increase in smartness comes at the cost of increased energy consumption. This paper describes a simulation first principle based system design of future intelligently managed street luminaries as smart lighting control system. Typical use cases were found and a simulation platform designed, to calculate estimated energy savings compared to regular LED-based light solutions, already reducing considerable lighting infrastructure costs. The paper presents a unique approach of mapping light area comparisons to simplified percentages and a promising simulation results of soon to be tested overall system energy efficiency increases by more than 20 % and CO2 reductions without compromising traffic safety while maintaining and even increasing smart features of tomorrows critical infrastructure.