Ask ten people what Light Art is and you will get ten answers — most of them about lamps, lasers or Christmas decorations. The field itself has surprisingly little settled theory: only one consistent scholarly encyclopedia exists, and no consensus definition. After a decade of making, curating and researching light-based work, here is the working definition I defended in my PhD:

Light Art is an artistic genre encompassing practices that treat light as principal material, artistic medium, or metaphor — marked by continuous evolution in relation to technology.

Three things matter in that sentence. First, light is the material, not the subject: a painting of a sunset is not Light Art; a room whose atmosphere is sculpted by projected wavelengths is. Second, the definition is deliberately wide enough to hold neon writing, mirror environments, projection mapping and laser fields — practices that rarely get discussed together. Third, the bond with technology is structural: every generation of Light Art has moved exactly as fast as the technology of light itself.

The genre has its own history — from Moholy-Nagy’s Light-Space Modulator through the Zero group and California’s Light and Space movement to Eliasson’s weather systems — its own institutions, its own market, and, increasingly, its own primary exhibition space: not the museum, but the festival. That shift is what my research calls festivalization, and it is where the most interesting questions in the field live today.