58|A FONDO The process of the Lighting Designer. From concept to reality During the first half of February we have had occasion to give three lectures which ELISAVA, School of Design and Engineering of Barcelona (UPF, Barcelona), scheduled within the Graduate in Lighting, of which we are Directors. The main title of this cycle was ‘Lighting Architecture’ and the theme to deve- lop was just ‘from concept to reality’. The speeches were given by Jordi Ballesta, Xavier Ferrés and I, in the Mitte gallery, the Basilica of the Sagrada Familia and the Mercer Hotel, all in Barcelona. We take now all these experiences to outline the process of the realization of the concept.