An indication device (D) is intended to equip a vehicle and comprises i) a first set (E1) of at least two first light sources (S1) capable of generating first photons, ii) a flat light guide (G), capable of transferring first photons supplying a rear face to a front face (FV) with a view to transferring same outwards so as to perform a photometric function, iii) a second set (E2) of at least two second light sources (S2) capable of generating second photons at substantially the same time as the associated first light sources (S1), and iv) an opaline screen (EO) located in the immediate proximity of the light guide (G) and capable of distributing the second photons outwards so as to provide substantially uniform illumination contributing to the photometric function.