Rear light unit of a vehicle and method for controlling the lighting of said rear light unit

A method for controlling lighting of a rear light unit of a vehicle comprising an array of first light sources adapted to emit orange or yellow light to provide a direction indicator and an array of second light sources adapted to emit red light of varying intensity to provide a tail and/or stop light,

• wherein said first light sources are arranged angularly offset along a first inner circumferential arrangement region and said second light sources are arranged angularly offset at least along a second outer circumferential arrangement region concentric to said first inner circumferential arrangement region of the first light sources,
• and wherein said first and second light sources are made by one or more light-emitting diodes with which a light diffusing body is associated, the first light sources having a diffuser body in the form of a prismatic pinnacle, and the second light sources having a blade-shaped diffuser body along whose median axis emerges orthogonally a septum which enters the first inner circumferential arrangement region of said first light sources according to radial directions inserted between two successive light sources;
• the method comprising the following operations in succession:
• a) switching on said array of first light sources in a flashing mode, for a predefined total flashing time or for a total number of predefined flashes;
• b) switching on said array of second light sources at a first level of minimum predetermined light intensity;
• c) switching off said array of first light sources;
• d) increasing the light intensity of said second light sources;
• e) upon reaching a predetermined maximum intensity threshold, or after a predetermined time, decreasing of the light intensity of said second light sources, and
• iterating operations a)-e) for a predetermined number of times.