A roof light for a sun shield

A roof light (20) for a sun shield (1) has two opposite sides (L1, L2), is provided with a diffusing screen (25) and is mounted on the sun shield (1) with the screen (25) facing a first side (L2) of the two sides (L1, L2); a moveable door (4) is associated to the screen (25) for facing, in a selective way, the screen (25) itself also on one second side (L1) of the two sides (L1, L2).