During a recent international exhibition of design in Milan, Italy, a workshop was held on “The traditional lighting systems and / or LED to illuminate the desk of the designers of the future society”. A technician chosen after a careful casting has broadcast live on twitter messages the summary of all the interventions. One of the most appreciated: “Put the light on the wall. Or demolish it” by Berlin architect, Wolfgang Kraus. It received, only in the Facebook version, 78 321 likes.