38|REPORTAJE From the 1930s artists as Zdenek Pesanek, Gyula Kosice and Nicolas Schöffer made sculptures combining light fountains, water and gas with mo- torized mobile structures and colored glass. They develop the dynamic art and create new movements such as light-Madi art and light-dynamism. In the 1950s the Zero Group, formed by Heinz Mack, Otto Piene, and Gün- ter Uecker, developed the kinetic art and the optical art with full ownership of artificial light. In the words of Mack ‘Light is decisive for my art ... Light has its own energy and quality. The light in a space and articulates a message.’ I want to emphasize the role of ‘me- aning’ and ‘message’ of light associated with the space. The use of materials such as aluminum, steel and plastics in their work is associated with the effects light produces on them as reflections, transparencies, shadows, rhythms and contrasts, etc. Some examples are works as Lichtba- llette (Light Ballet) and Rauchbilder (images of smoke), by Otto Piene, in which it became clear the relationship between energy and the work. They all fall close to the concepts of kinetic art, but still do not address the spatial dimension of the work, which will be a feature of the artists of Light Art. It is in the 60s when the observer becomes a key element for the reality of the work, which deals with visual perception, the psychological emotions, the spatial understanding, etc. The space will assume different roles, from a complete independence, up to be a necessary element for the perception and realization of light. The relationship between the works of Light Art and the architectural space, urban or landscape, has followed diffe- rent trends and which together have created the grounds of the current sen- sitivity to artificial light and its undenia- ble influence on architectural lighting. 2. Light sculptures. Materialized light. Physical object, perceptual object. One of the first experiences of the Light Art is the aesthetic use of light sources: incandescent lamps, neon tubes and fluorescent tubes. With them the artists will build extensive walls, sculptures and lighting objects, with the light per- vading the space that contains them. Zug railway Station de Zug, Suiza. J Turrel y Hornberger Architekten “The relationship between the works of Light Art and the architectural space, urban or landscape, has fo- llowed different trends and which together have crea- ted the grounds of the current sensitivity to artificial light and its undeniable influence on architectural lighting”.