A lighting arrangement includes a lighting chamber having a light-permeable section and a ventilation opening with a filtering membrane. A light source for supplying light is arranged in the lighting chamber. A ventilation arrangement is assigned to the ventilation opening so as to supply ambient air through the ventilation opening to the lighting chamber. The ventilation arrangement includes an air outlet opening assigned to the ventilation opening of the lighting chamber so as to supply the ambient air to the ventilation opening. A distance between the air outlet opening and the filtering membrane is configured so as to be adjustable.