History, Ambivalences and Perspectives in 21st Century Lighting Design

A critical reflection on the evolution of artificial light in modern architecture

In contemporary architectural design, the relationship with light continues to be marked by a profound ambivalence. On the one hand, it is celebrated in its natural dimension, as the generative matrix of space: consider Le Corbusier's famous definition, according to which architecture is "the reaction of solids with light," or Louis Kahn's statement, which defines it as "the source of all presence," the foundation of matter and shadow. On the other hand, when it presents itself in its electrical and artificial form, light is often relegated to a mere technical matter, emptied of any symbolic, expressive, or design meaning.

This dichotomy has profoundly affected 20th-century design thinking, giving rise to two often divergent approaches. On the one hand, a technical-scientific vision, in which light is treated as a measurable physical-energetic phenomenon, framed within standardized and verifiable calculation methods. On the other, an artistic-perceptual vision, which considers light a visual language, a system of signs, capable of constructing meaning and relationships through representation. The latter has found its privileged fields in theater, photography, and cinema, where light has become a narrative and symbolic tool.

The birth of lighting technology as a discipline lies precisely within the forefront, with the founding of the Commission Internationale de l’Éclairage (CIE) in 1913, which marked the beginning of the technical-scientific codification of light and its connection to electricity generation. Since then, light has been progressively reduced to a set of calculable units—lumen, lux, candela—and subjected to a prescriptive system designed to ensure performance, efficiency, and safety. In particular, collective spaces—factories, schools, hospitals, offices, infrastructure—have been the first to undergo this process. Light, in these contexts, is often "resolved" in an efficient relationship between intensity and surface area, leaving little room for design research.

However, in symbolically relevant settings—such as places of worship, institutions, theaters, or performance spaces—light has retained a differentiating role. As Roland Barthes, one of the most influential French intellectuals of the 20th century, known for his fundamental contributions to semiology, literary criticism, and communication theory, observed, modern societies are still pervaded by "rites of social prestige" in which light acts as a scenic element, capable of constructing hierarchies, emotions, and meanings. In these contexts, light is not only an illuminating factor, but a means of communication.

In light of this history, today more than ever it seems urgent to rethink lighting design as a multidimensional system that spans disciplines, cultures, and knowledge. Far from being a sectoral area, contemporary lighting is a strategic and interdisciplinary field, in which architecture, design, engineering, regulations, economics, ecology, and visual culture converge. Light is not just a luminous emission, but a cultural and environmental factor that influences the way we inhabit, perceive, and transform space.

In this scenario, the lighting ecosystem presents itself as a complex and constantly evolving reality. It encompasses emerging technologies, evolving regulatory systems, international competitions, energy policies, industrial models, and artistic and educational practices. Every day, these elements overlap, complement each other, and sometimes contradict each other, helping to redraw the map of lighting design.

In the current context, dominated by technological acceleration, process optimization, and the automation of design decisions, it is essential to reaffirm the value of a critical, exploratory, and reflective approach. Lighting design cannot be reduced to a mechanical or performance-based operation: it requires an open mindset, capable of questioning the complexity of reality, addressing ambiguities, and building connections between technical knowledge and design imagination.

Design curiosity, understood as a striving toward the unknown, thus emerges as the true driving force of research. Only through an experimental and interdisciplinary approach is it possible to read the signs of change, imagine future scenarios, and propose solutions that combine efficiency and poetry, norm and vision, measure and meaning.

In this framework, light is not simply what illuminates. It is what reveals, what constructs space, what modifies perception, what transforms. It is an autonomous design material, a critical language, and a tool for meaning. Thinking about light—today—means reconnecting past, present, and future, overcoming historical dichotomies, and shaping a new design ecology, grounded in the integration of science, culture, and imagination.