The three different lighting scenarios that were tested at the street lighting test site and thereafter compared (Figure 3) are as follows:baseline scenario with its existing linear catenary suspension luminaire equipped with fluorescent tube luminaires(FTL);FTL replaced with commercially available state-of-the-art LED luminaires(LED1);FTL replaced with functional samples of “optimized” LEDs constructed by Bartenbach GmbH based on the findings from the two previous scenarios(LED2