Lighting system for a motor-vehicle comprising at least one lighting module comprising a first set of light sources and a second set of light sources and secondary optical means (8, 10), the secondary optical means (8, 10) being arranged so as to form, from the light emitted by the light sources of the first set, one spot of light per light source, each spot having a luminous strip shape extending substantially in the same first direction, the module further comprising primary optical means (16, 116, 216, 316) arranged to form, in cooperation with the secondary optical means (8, 10) and from the light emitted by the light sources of the second set, one spot of light per light source, each spot having a luminous strip shape extending substantially in a second direction not parallel to the first, the primary optical means being common to the first and second sets (4, 5) of light sources and being formed by light guides positioned on at least some of the light sources of the first set and being able each to receive at least some of the light emitted by the light sources emitted by the second set, each light guide (16, 116, 216, 316) having at least one extraction face (18, 118, 218, 318), this extraction face (18, 118, 218, 318) comprising light-extracting means (20, 120, 220) able to direct at least some of the light emitted by the light sources of the second set out of the guide (16, 116, 216, 316) so as to form spots of light having a luminous strip shape substantially parallel to the second direction; characterized in that the light sources of the first set are placed such that the light emitted by said light sources of the first set pass through the extracting means (20, 120, 220) of the light guides (16, 116, 216, 316), the extracting means being arranged so as not to deviate said light emitted by said light sources of the first set. the secondary optical means (8, 10) being arranged so as to form, from the light emitted by the light sources of the first set, one spot of light per light source, each spot having a luminous strip shape extending substantially in the same first direction, the module further comprising primary optical means (16, 116, 216, 316) arranged to form, in cooperation with the secondary optical means (8, 10) and from the light emitted by the light sources of the second set, one spot of light per light source, each spot having a luminous strip shape extending substantially in a second direction not parallel to the first, the primary optical means being common to the first and second sets (4, 5) of light sources and being formed by light guides positioned on at least some of the light sources of the first set and being able each to receive at least some of the light emitted by the light sources emitted by the second set, each light guide (16, 116, 216, 316) having at least one extraction face (18, 118, 218, 318), this extraction face (18, 118, 218, 318) comprising light-extracting means (20, 120, 220) able to direct at least some of the light emitted by the light sources of the second set out of the guide (16, 116, 216, 316) so as to form spots of light having a luminous strip shape substantially parallel to the second direction; characterized in that the light sources of the first set are placed such that the light emitted by said light sources of the first set pass through the extracting means (20, 120, 220) of the light guides (16, 116, 216, 316), the extracting means being arranged so as not to deviate said light emitted by said light sources of the first set.