Rear view mirror comprising a hollow light guide

The invention is related to a lighting element for use in automotive environment with a light guiding device mounted to direct light from at least one a light source to at least one decoupling area of the light guide wherein the light guide is made of plastic material where the light guide is a hollow light guide with an air gap core limited by at least one wall, where the light is mainly guided in the air gap core and the light is at least partly reflected by total reflection effects by the at least one wall.