a primary optics (100) having a base body (110) and a plurality of light guiding elements (120) protruding from the base body (110) for forming a predetermined light distribution from light of light sources in a main direction (X), wherein each light guiding element (120) has a light input surface (121), into which light of the light sources can be coupled into the light guiding element (120), and a common light output surface (130) having an optically relevant area (131), which is designed as a curved surface, and a peripheral area (132), which limits the optically relevant area (131) of the common light output surface (130), wherein the curved surface of the optically relevant area (131) is curved along at least two axes, wherein the two axes are orthogonal to the main direction (X), and wherein the two axes are orthogonal to each other;

a holder (300), which is arranged on a backside of the primary optics (100), the light guiding elements (120) of the primary optics (100) passing through the holder (300) through an opening area of the holder (300), which opening area is configured to receive the light guiding elements (120) of the primary optics (100) and to hold them in position regarding the light sources; and

a cover element (400), which is arranged on a front side of the primary optics (100) facing away from the light guiding elements (120) of the primary optics (100), wherein the cover element (400) is attachable to the holder (300) by means of at least one first engagement element arranged on the cover element (400), which first engagement element is configured to engage with at least one second engagement element arranged on the holder (300), wherein the cover element (400) in combination with the holder (300) is configured to fix the position of the primary optics (100) between the holder (300) and the cover element (400), when the cover element (400) is attached to the holder (300),

wherein the primary optics (100) comprises a stabilizing structure (200), wherein the stabilizing structure (200) is built as a protrusion projecting from the common light output surface (130) in the main direction (X), wherein the stabilizing structure (200) has a first support surface (210), and wherein the common light output surface (130) at least partially surrounds the stabilizing structure (200),

wherein the cover element (400) comprises a first counter-support surface (410), which follows the form of the first support surface (210) of the stabilizing structure (200),

wherein the base body (110) of the primary optics (100) comprises a second support surface (140), which is arranged on the opposite side of the first support surface (210) on the backside of the primary optics (100), and wherein the holder (300) comprises a second counter-support surface,

wherein the first counter-support surface (410) in combination with the first support surface (210) of the stabilizing structure (200) is configured to stabilize the position of the curved surface of the optically relevant area (131) of the common light output surface (130) of the primary optics (100) when the cover element (400) is attached to the holder (300), and

wherein the cover element (400) presses against the first support surface (210) of the stabilizing structure (200) and the second counter-support surface of the holder (300) presses against the second support surface (140) of the base body (110), when the cover element (400) is attached to the holder (300).