Light module for generating a predetermined asymmetrical light distribution, comprising an illuminant and an optical body, in particular a lens for generating a predetermined asymmetrical light distribution, the optical body comprising - a light coupling side with light coupling surfaces (33, 34, 35, 36) tilted towards each other for coupling light from an illuminant, - a light decoupling side with light decoupling surfaces (41, 55) tilted towards each other for decoupling light coupled at the light coupling side, wherein - the light coupling surfaces (33, 34, 35, 36) are provided at least partially by boundary surfaces of a recess arranged on the light coupling side of the optical body, wherein the illuminant is arranged on the light coupling side of the optical body for the irradiation of light in the recess and the recess is designed to receive light rays from the illuminant and to refract these into the optical body at the light coupling surfaces (33, 34, 35, 36), and wherein - the light coupling side and the light decoupling side are each divided by an imaginary plane into two sections which lie in two spatial regions (I, II) separated by the plane; - the optical body has, in a first of the two sections, a side surface section (45, 57) which connects the light coupling side and the light decoupling side and which is designed for operation in which it acts doubly totally reflecting, which side surface section represents, on the light decoupling side, an outside surface of a projection, and wherein the projection has a light decoupling surface opposite this outside surface for decoupling light which is predominantly doubly totally reflected, and the light decoupling surface is designed to refract decoupled light in the direction of the second half-space, characterized in that the module further has a funnel-shaped aperture device which is optically downstream of the optical body, and the aperture device is arranged on the light decoupling side of the optical body and, during operation, part of the light from the illuminant which is coupled at the light coupling side of the optical body is doubly totally reflected on the side surface section (45, 57) which is designed to act doubly totally reflecting for operation and is directed to the light decoupling surface of the projection, which light decoupling surface is designed to refract this decoupled light in such a way that the light is directed beyond a limiting edge of the aperture device into the second half-space. - a light coupling side with light coupling surfaces (33, 34, 35, 36) tilted towards each other for coupling light from an illuminant, - a light decoupling side with light decoupling surfaces (41, 55) tilted towards each other for decoupling light coupled at the light coupling side, wherein - the light coupling surfaces (33, 34, 35, 36) are provided at least partially by boundary surfaces of a recess arranged on the light coupling side of the optical body, wherein the illuminant is arranged on the light coupling side of the optical body for the irradiation of light in the recess and the recess is designed to receive light rays from the illuminant and to refract these into the optical body at the light coupling surfaces (33, 34, 35, 36), and wherein - the light coupling side and the light decoupling side are each divided by an imaginary plane into two sections which lie in two spatial regions (I, II) separated by the plane; - the optical body has, in a first of the two sections, a side surface section (45, 57) which connects the light coupling side and the light decoupling side and which is designed for operation in which it acts doubly totally reflecting, which side surface section represents, on the light decoupling side, an outside surface of a projection, and wherein the projection has a light decoupling surface opposite this outside surface for decoupling light which is predominantly doubly totally reflected, and the light decoupling surface is designed to refract decoupled light in the direction of the second half-space, characterized in that the module further has a funnel-shaped aperture device which is optically downstream of the optical body, and the aperture device is arranged on the light decoupling side of the optical body and, during operation, part of the light from the illuminant which is coupled at the light coupling side of the optical body is doubly totally reflected on the side surface section (45, 57) which is designed to act doubly totally reflecting for operation and is directed to the light decoupling surface of the projection, which light decoupling surface is designed to refract this decoupled light in such a way that the light is directed beyond a limiting edge of the aperture device into the second half-space.