The present invention relates to a lighting unit comprising a first glass pane (1) with a first light source (4), coupled to the first window to be transmitted to the instant t0 at λ1 and to transmit at the instant t = t0 to λ2 distinct from λ1, the first means of light extraction (5) and of the first masking means (6) of the light extracted on the internal surface, in optical contact with the first window, a second glass sheet (1 ′) with a second light source (4 '), which is optically coupled to the second glazing, to transmit to said t0 at λ3 is distinct from λ1, the second means of light extraction (5 ′) and the second masking means (6 ′) of the light on the face of the adhesive bonding, between the first masking means and the second extraction means, a first optical isolator (2), laminated with a first lamination interlayer (3), between the first masking means and the second extraction means, a second optical isolator (2, 2 ′), which is coincident with the first optical isolator or separate and closer to the second extraction means, the second optical isolator (2, 2 ′) is laminated to the second glazing unit by means of a second lamination interlayer (3').
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