Urban lighting is evolving from a basic technical infrastructure to a strategic tool for sustainable regeneration, energy efficiency, and public space reactivation. This paper explores the potential of smart and adaptive lighting systems as enablers of 24 h services, equitable access, and environmental resilience. By integrating lighting strategies with urban planning instruments (PRIC, PEC, PMU), cities can reduce energy consumption, limit light pollution, and foster new urban centralities. The study outlines regulatory gaps, technical solutions, and cultural shifts needed to transform lighting into a key asset for livable, inclusive, and digitally enabled urban futures.