The light sifts, reveals, dazzles. It is symbolically linked with the demiurgic act. Fiat lux. Let the light be. But in a hyper-technological world, this vital and creative power can be reversed. In the shape of a constellation, the exhibition Lumière)s( offers the journey of a galactic geometry which reveals light as ambivalent substance. The modules of the exhibition are structured around the link between light, dance, design, medicine and new technologies. Spread in different space-time continuums, they are a stellar system : places and times of the events will reflect the paradoxes of a light sometimes natural, sometimes artificial, displayed in the Biennial as well as in the city, day or night, whether permanent or ephemeral.