The invention relates to an illumination apparatus (1) having at least one light-emitting diode (LED) and at least one heat sink (4) for cooling the light-emitting diode. At least one of the components (3, 4) of the illumination apparatus (1), particularly the heat sink (4), has an emission coefficient of more than 0.75, preferably of more than 0.8, particularly preferably of more than 0.9 at least in sub-regions on at least one free surface.