In the method for manufacturing a lamp, the lamp vessel (1) is inserted gastightly with the open end (5) into a pumping head (2) with a holder (6) which bears a sealing plate (7) with an electrode system and connecting pins (10). The sealing plate (7) has here an external contour which is a little smaller than the internal contour of the open end (5) of the lamp vessel (1), so that the lamp vessel (1) can be pumped and filled with gases via the pumping head (2). The edge of the sealing plate (7) and the lamp vessel (1) are subsequently heated so that the lamp vessel (1) buckles in at the level of the sealing plate (7) and connects gastightly to the edge of the sealing plate (7). The protruding end (5) of the lamp vessel (1) is then cut off.
