Vehicle light comprising - a container body that delimits a containment seat that houses at least one light source suitable to emit, when electrically powered, a plurality of light rays (Ri) defining a light beam to propagate outside of the vehicle light, - a lenticular body, that partially closes the containment seat and is suitable to be crossed by said light beam produced by the light source, - a light guide facing, in correspondence of a light inlet wall, to said at least one light source, so as to receive the light beam from this and transmit it to a light outlet wall, facing the lenticular body, - wherein the light guide comprises a body having a prevailing longitudinal extension that defines the propagation direction of the light beam inside the body by total internal reflection, a first and a second side wall (40,44) substantially parallel to said prevailing longitudinal extension, wherein - the body has a first groove, which extends from the first to the second side wall (40,44), the first groove comprising a plurality of first holes, defining cylindrical or spherical optics suitable to realize cylindrical or spherical caustics that produce, through successive refractions, a scattering of said light rays (Ri) towards the light outlet wall so as to emit a light beam with opalescent effect, wherein said first holes are adjacent to each other without interruption, so to define the first groove, wherein said first holes of the first groove are blind with respect to a thickness of the body of the light guide, penetrating from a first face of the body for a first depth less than said thickness. - a container body that delimits a containment seat that houses at least one light source suitable to emit, when electrically powered, a plurality of light rays (Ri) defining a light beam to propagate outside of the vehicle light, - a lenticular body, that partially closes the containment seat and is suitable to be crossed by said light beam produced by the light source, - a light guide facing, in correspondence of a light inlet wall, to said at least one light source, so as to receive the light beam from this and transmit it to a light outlet wall, facing the lenticular body, - wherein the light guide comprises a body having a prevailing longitudinal extension that defines the propagation direction of the light beam inside the body by total internal reflection, a first and a second side wall (40,44) substantially parallel to said prevailing longitudinal extension, wherein - the body has a first groove, which extends from the first to the second side wall (40,44), the first groove comprising a plurality of first holes, defining cylindrical or spherical optics suitable to realize cylindrical or spherical caustics that produce, through successive refractions, a scattering of said light rays (Ri) towards the light outlet wall so as to emit a light beam with opalescent effect, wherein said first holes are adjacent to each other without interruption, so to define the first groove, wherein said first holes of the first groove are blind with respect to a thickness of the body of the light guide, penetrating from a first face of the body for a first depth less than said thickness.