A system includes a housing, at least two lighting units, a lens, at least two fastening elements, and a protective optical element which covers the fastening elements of the lighting system. The lens and the housing are provided with at least two corresponding openings provided in a central area and configured to allow the positioning of the fastening elements. The lens has a frontal surface, comprising a central recessed area. Tubular elements oriented inwards to the lighting system extend and fit into the corresponding holes, when assembling the lens and the housing.