Teletransfer, the company in charge of the Barcelona Bus Services advertising, contacted Luz Negra’s technical department for a solution to placing publicity on the bus exteriors but with one condition: it had to be extra thin. In order to do that, Luz Negra developed and manufactured a series of extra slim light boxes, only 1 cm deep and illuminated by waterproof leds (Granada model in its waterproof version). The leds were housed inside the profile (led profile Hannover) and the light projected to the edge of the optic methacrylate (plexiled dotting), which reflected the light in a frontal way. The end result being an illuminated marketing display with the same depth as a display with no light.
