20|AULA cd lighting where the architectonic language is accentuated by the light. » Integrated Lighting Systems are put in place in solidarity with the spaces disposed exclusively in the constitutive elements of the building itself, such as roofs, walls, pavements, furniture, etc. Usually, they are part of the project since the first formal decisions are made, having a fixed position hardly movable. But the decision of making the lighting systems part of the architectonic project is not always made, and we also find other positioning ways like the attached, suspended or the built- in ones, in a visible and very obvious form. This is the case of visible lighting systems. » Visible Lighting Systems are characteristic because the luminaries have a very important visual presence in the working area. Their shape, their organizational structure and their formal disposition have an important perceptive presence and are important in the view and global definition of the space. The formal language of the luminaries and the space become visible and are in need of a project plan that takes into account its relation. They can adopt diverse forms depending on the spatial disposition, given that they are made of elements with shapes and very variable characteristics considering the large variety of products existing in the market and the diversity of spaces and current uses of architecture). An exhaustive classification from this point of view would be impossible and very restrictive although we could group them conceptually, considering the relation the system adopts with respect to the container space. Thus, we can establish a classification of the Visible Lighting Systems in Formal Integration Systems and Own Formal Expression Systems. Sistema de integración formal. Hotel Puerta América. Kathrin Findlay, Arq. When the lighting system and the space have in common the aesthetic language, they relate to each other and interact in a formal way, following similar criteria: being rhythmic, chromatic, organizational or compositional. Moreover, the perception and comprehension of the system are not possible outside the container space, then we will say that it is a Formal Integration System. On the other hand, if the lighting system and the space do not share the language, in other words: both of them have an aesthetic, a structure and their own and distinct form of organization, then we perceive the system as a unique element in the space and in this case we will say that it is a Self Formal Expression System. 2.5 Classification of the Self Formal Expression Systems depending on the Form, the Disposition and the Organization of the luminaries. In the Visible Lightning Systems with Self Formal Expression, the compositional structure is characterized by the form of organization of the luminaries and also by the relation with the formal organization of the space. The most commonly used forms of luminaries are: accurate forms, linear forms, surface forms and volumetric1 forms. The way in which luminaries are organized in a group or a whole, as constitutive parts of the lighting system, can be done adopting the following dispositions: Linear Dispositions. In a linear disposition, the luminaries follow a directrix and are separated by a particular distance. The whole is read unitarily as a luminary line. Grouped Dispositions. It takes place when a non numerous whole (normally less than 8) of luminaries is disposed in a way that it configures a concrete and recognizable figure: axial, geometric, abstract or any other form which, by repetition, can fill all the space. Dispositions in Mesh or Reticle. This disposition takes place when the luminaries define a geometrical mesh or a regular reticle, which responds to recognizable geometric laws. Its interpretation is not based on a unitary element but on undefined structures which can get to cover, by extension, any space. Singular Dispositions or Self Structures In this disposition, the luminaries Sistema de expresión formal propia. Hotel Hesperia. Richard Rogers