A recessed lighting fixture can stuffer for covering recessed lighting fixtures has a handle attachment body, a pressing plate and a piercing pin. The oil module is provided with channels for guiding oil and water, one of the channels being an oil cooler bypass channel connecting an oil inlet of the oil cooler to an oil outlet of the oil cooler. The method involves separating the Fischer-Tropsch products into a light fraction and a heavy fraction. The first side surface has a recessed region adjoining the corner edge, and the injection of charge carriers from the first contact strip is suppressed in the recessed region.