Lighting and/or signalling device, in particular for the automotive sector, comprising: - at least two LED light sources (16',16"), powered and activated separately, each facing a respective light input wall (32',32") of a corresponding light guide (28',28"), - wherein said light guides (28',28') are suitable to transmit and emit the light of said LED light sources (16',16 ") through at least two distinct lighting faces (36,40 at a front wall of the lighting device, permeable to light, the light guides (28',28") being provided with diffuser extractor elements arranged on a rear wall of the light guides (28',28 "), opposite the front wall, and shaped so as to extract the light outside the lighting and/or signalling device, - wherein said light guides (28',28") are juxtaposed and adjacent to each other at at least one respective inner wall, - wherein said light guides (28',28") are mechanically and optically separated by barrier elements which prevent the passage of light between the light guides (28',28") at said at least one inner wall, wherein said barrier elements are separator septa opaque to the light extending from the rear wall to at least said front wall, crossing it completely, characterised in that said extractor diffuser elements are shaped so as to extract the light at least partially towards the rear wall, wherein at least one reflector element is associated with each light guide (28',28' ') directly facing the respective diffuser extractor elements so as to reflect the light towards the front wall, wherein said barrier elements extend from the reflector element to at least said front wall, crossing it completely, wherein said barrier elements completely cross any portion transparent to light rays arranged beyond the reflector element toward the front wall, comprising the latter. - at least two LED light sources (16',16"), powered and activated separately, each facing a respective light input wall (32',32") of a corresponding light guide (28',28"), - wherein said light guides (28',28') are suitable to transmit and emit the light of said LED light sources (16',16 ") through at least two distinct lighting faces (36,40 at a front wall of the lighting device, permeable to light, the light guides (28',28") being provided with diffuser extractor elements arranged on a rear wall of the light guides (28',28 "), opposite the front wall, and shaped so as to extract the light outside the lighting and/or signalling device, - wherein said light guides (28',28") are juxtaposed and adjacent to each other at at least one respective inner wall, - wherein said light guides (28',28") are mechanically and optically separated by barrier elements which prevent the passage of light between the light guides (28',28") at said at least one inner wall, wherein said barrier elements are separator septa opaque to the light extending from the rear wall to at least said front wall, crossing it completely, characterised in that said extractor diffuser elements are shaped so as to extract the light at least partially towards the rear wall, wherein at least one reflector element is associated with each light guide (28',28' ') directly facing the respective diffuser extractor elements so as to reflect the light towards the front wall, wherein said barrier elements extend from the reflector element to at least said front wall, crossing it completely, wherein said barrier elements completely cross any portion transparent to light rays arranged beyond the reflector element toward the front wall, comprising the latter.