This lecture explores public lighting as a strategic tool for social inclusion, urban safety, mobility, and the democratization of public space. Light is addressed not merely as a technical component, but as a driver of urban transformation and spatial justice. Focus - Demonstrating how public lighting policies and projects can reduce urban inequalities, create safer and more welcoming cities, and ensure the right to the city for all people — especially vulnerable groups such as women, children, the elderly, people with disabilities, and unhoused populations. - Presenting best practices, accessible technologies, and participatory models of urban planning centered on lighting design. Discussing the impacts of lighting across key dimensions including safety, health, nighttime mobility, access to services, culture, and leisure.