Light conduction body and illumination unit with light conduction body

The invention relates to a light guide body (31), the cross-sectional area of ​​which at least partially continuously expands from a light entry surface (34) to a light exit surface (36), and a light unit having at least one light emitting diode (22) as a light source (20) and a light guide body. For this purpose, the optical waveguide comprises at least one region with a curved guideline, wherein in this region the curvature of the guideline is constant or in which region the curvature of the guideline decreases with increasing cross section of the optical waveguide. With the present invention, a light guide body and a light unit is developed, which enables a smooth transition of the illuminance at a sharply delineated light-dark boundary of the illuminated area at the other edges.