A lighting device (1b;1c), the lighting device being a DRL and the lighting device being of the type adapted to generate in use a first predetermined photometric projection (P2,P3) adapted to fulfill a predetermined light distribution law defined by a required photometric projection (P1) and comprising a plurality of modules (M), each of which comprising, in turn, a light source and means for distributing the radiation emitted by the light source so as to generate, for each module, a second predetermined photometric projection (P2'; P2"; P3') for each module; wherein said means for distributing the light radiation of each module (M) are designed so that, in combination: - the second predetermined photometric projection (P2';P2";P3') of each module (M) has, along at least one axis of a pair of orthogonal axes (C1,C2) defining the laying plane of said photometric projections (P2,P3), a width greater than the width required for the first photometric projection along such axis, according to said predetermined law, i.e. greater than the width of said required photometric projection; - the second photometric projection (P2';P2";P3') generated by each module (M) always has a punctual intensity lower than that of the first photometric projection (P2,P3); - the second photometric projections (P2';P2";P3') are at least partially overlapped in such a manner that all together the modules (M) generate the punctual intensity of the first photometric projection (P2,P3); characterized in that the means for distributing the light radiation provide a DRL function by overlapping the second photometric projections (P2';P2";P3) of all the modules (M), i.e. a first photometric projection (P2,P3) adapted to meet the DRL standard, when the device (1b;1c) is mounted on a vehicle within a predetermined range of possible angular orientations (α,β), which are different from one another, of the device itself with respect to a forward axis (A) of the vehicle. - the second predetermined photometric projection (P2';P2";P3') of each module (M) has, along at least one axis of a pair of orthogonal axes (C1,C2) defining the laying plane of said photometric projections (P2,P3), a width greater than the width required for the first photometric projection along such axis, according to said predetermined law, i.e. greater than the width of said required photometric projection; - the second photometric projection (P2';P2";P3') generated by each module (M) always has a punctual intensity lower than that of the first photometric projection (P2,P3); - the second photometric projections (P2';P2";P3') are at least partially overlapped in such a manner that all together the modules (M) generate the punctual intensity of the first photometric projection (P2,P3); characterized in that the means for distributing the light radiation provide a DRL function by overlapping the second photometric projections (P2';P2";P3) of all the modules (M), i.e. a first photometric projection (P2,P3) adapted to meet the DRL standard, when the device (1b;1c) is mounted on a vehicle within a predetermined range of possible angular orientations (α,β), which are different from one another, of the device itself with respect to a forward axis (A) of the vehicle. <EOS>