A light emitting diode, LED, armature comprising: a plurality of first LEDs facing a first direction, and arranged in a line in a second direction, substantially perpendicular to the first direction; for each first LED (2, 2') among the plurality of first LEDs, a reflector substantially facing the first direction, arranged adjacent to that first LED (2, 2') in a third direction, substantially perpendicular to the first and second directions, and a further reflector substantially facing the first direction and arranged adjacent to said first LED (2, 2') in a direction opposite to the third direction; a lens elongated in the second direction, of which a receiving side (10, 10') is configured to receive light from the plurality of first LEDs, and of which an emission side is configured to emit, as a bundle, light that was received on the receiving side (10, 10'), and that has passed through the lens; wherein the receiving side (10, 10') of the lens is adapted for reflecting a part of the light emitted by one first LED (2, 2') among the plurality of first LEDs onto the reflector adjacent to that LED, allowing that part of the light to be reflected by that reflector towards the receiving side (10, 10'); wherein the receiving side (10, 10'), in the cross-sectional plane perpendicular to the second direction, is described by a plurality of curves; wherein a first curve among the plurality of curves is shaped such that light, emitted by said one first LED (2, 2') that falls onto the part of the receiving side described by the first curve, is partially reflected towards the reflector adjacent to that one first LED (2, 2'); wherein a second curve among the plurality of curves, adjoining the first curve, is shaped such that light emitted by said one first LED (2, 2') that falls onto the part of the receiving side described by the second curve, is partially reflected towards the further reflector adjacent to that one first LED (2, 2'); characterized in that the first and second curves are circular arcs of which the centres are arranged at the reflector, and the further reflector respectively; wherein each of the two circular arcs has an angle between 90 and 180 degrees, preferably between 95 and 135 degrees. a plurality of first LEDs facing a first direction, and arranged in a line in a second direction, substantially perpendicular to the first direction; for each first LED (2, 2') among the plurality of first LEDs, a reflector substantially facing the first direction, arranged adjacent to that first LED (2, 2') in a third direction, substantially perpendicular to the first and second directions, and a further reflector substantially facing the first direction and arranged adjacent to said first LED (2, 2') in a direction opposite to the third direction; a lens elongated in the second direction, of which a receiving side (10, 10') is configured to receive light from the plurality of first LEDs, and of which an emission side is configured to emit, as a bundle, light that was received on the receiving side (10, 10'), and that has passed through the lens; wherein the receiving side (10, 10') of the lens is adapted for reflecting a part of the light emitted by one first LED (2, 2') among the plurality of first LEDs onto the reflector adjacent to that LED, allowing that part of the light to be reflected by that reflector towards the receiving side (10, 10'); wherein the receiving side (10, 10'), in the cross-sectional plane perpendicular to the second direction, is described by a plurality of curves; wherein a first curve among the plurality of curves is shaped such that light, emitted by said one first LED (2, 2') that falls onto the part of the receiving side described by the first curve, is partially reflected towards the reflector adjacent to that one first LED (2, 2'); wherein a second curve among the plurality of curves, adjoining the first curve, is shaped such that light emitted by said one first LED (2, 2') that falls onto the part of the receiving side described by the second curve, is partially reflected towards the further reflector adjacent to that one first LED (2, 2'); characterized in that the first and second curves are circular arcs of which the centres are arranged at the reflector, and the further reflector respectively; wherein each of the two circular arcs has an angle between 90 and 180 degrees, preferably between 95 and 135 degrees.