Optical system for influencing a light emitted by an LED light source, comprising - a lens for influencing the light and - a pot-shaped reflector, the shape of which defines a main axis, wherein the reflector comprises inward-facing reflective surface regions and forms a light exit opening with respect to the main axis on a first side, wherein the lens is disposed on a second side of the reflector opposite to the first side such that, after exiting the lens, the light travels a path to the light exit opening and then leaves the reflector through said light exit opening, wherein the optical system is designed in such a way that a predominant portion of the light on the path between the lens and the light exit opening is not reflected at the reflective surface regions of the reflector and only a further, smaller portion of said light is reflected at the reflective surface regions of the reflector, wherein the reflector is arranged such that the reflective surface regions partially surround the lens in a ring-like manner, and wherein the reflector is shaped rotationally symmetrically with respect to the main axis or has a square, rectangular or elliptical shape in a cross-section normal to the main axis, characterised in that the lens is disposed such that it passes through the main axis, wherein the reflector is designed such that, in a section through the main axis, the reflective surface regions describe a bell shape, and wherein the following applies for the extension (h) of the lens parallel to the main axis: 0.2 H < h < 0.3 H, wherein H corresponds to the extension of the reflector along the main axis, and wherein, viewed in a section through the main axis, the extension ( d) of the lens normal to the main axis is at least 40% of the extension of the light exit opening. - a lens for influencing the light and - a pot-shaped reflector, the shape of which defines a main axis, wherein the reflector comprises inward-facing reflective surface regions and forms a light exit opening with respect to the main axis on a first side, wherein the lens is disposed on a second side of the reflector opposite to the first side such that, after exiting the lens, the light travels a path to the light exit opening and then leaves the reflector through said light exit opening, wherein the optical system is designed in such a way that a predominant portion of the light on the path between the lens and the light exit opening is not reflected at the reflective surface regions of the reflector and only a further, smaller portion of said light is reflected at the reflective surface regions of the reflector, wherein the reflector is arranged such that the reflective surface regions partially surround the lens in a ring-like manner, and wherein the reflector is shaped rotationally symmetrically with respect to the main axis or has a square, rectangular or elliptical shape in a cross-section normal to the main axis, characterised in that the lens is disposed such that it passes through the main axis, wherein the reflector is designed such that, in a section through the main axis, the reflective surface regions describe a bell shape, and wherein the following applies for the extension (h) of the lens parallel to the main axis: 0.2 H < h < 0.3 H, wherein H corresponds to the extension of the reflector along the main axis, and wherein, viewed in a section through the main axis, the extension ( d) of the lens normal to the main axis is at least 40% of the extension of the light exit opening. wherein the optical system is designed in such a way that a predominant portion of the light on the path between the lens and the light exit opening is not reflected at the reflective surface regions of the reflector and only a further, smaller portion of said light is reflected at the reflective surface regions of the reflector, wherein the reflector is arranged such that the reflective surface regions partially surround the lens in a ring-like manner, and wherein the reflector is shaped rotationally symmetrically with respect to the main axis or has a square, rectangular or elliptical shape in a cross-section normal to the main axis, characterised in that the lens is disposed such that it passes through the main axis, wherein the reflector is designed such that, in a section through the main axis, the reflective surface regions describe a bell shape, and wherein the following applies for the extension (h) of the lens parallel to the main axis: 0.2 H < h < 0.3 H, wherein H corresponds to the extension of the reflector along the main axis, and wherein, viewed in a section through the main axis, the extension ( d) of the lens normal to the main axis is at least 40% of the extension of the light exit opening. 0.2 H < h < 0.3 H, wherein H corresponds to the extension of the reflector along the main axis, and wherein, viewed in a section through the main axis, the extension ( d) of the lens normal to the main axis is at least 40% of the extension of the light exit opening.