Abstract: A ceramic burner, a ceramic metal halide lamp, and a method of sealing the ceramic burner is provided. The ceramic burner comprises a discharge vessel enclosing a discharge space that is provided with an ionizable filling comprising one or more halides. The discharge vessel comprises a ceramic wall arranged between a first and a second end portion. The first and the second end portion are arranged such that current supply conductors are passed through the end portions to respective electrodes arranged in the discharge space for maintaining a discharge. The ceramic wall of the discharge vessel comprises a tube for introducing the ionizable filling into the discharge vessel during manufacture of the ceramic burner. The tube projects from the ceramic wall and is provided with a gastight seal. The effect of using the tube is that it enables the gastight seal to be arranged away from the ceramic wall of the discharge vessel at a projecting end of the tube.

Abstract: The invention provides a metal halide lamp 1 wherein the concentration of the filling components fulfill a condition according to claim 1. Such a lamp is found to be a good alternative to existing high-pressure discharge lamps (Ceramic Discharge Metal halide lamps) based on rare earth fillings or other metal halide fillings. In addition, such a lamp can be dimmed without a substantial shift of the color point. Such a lamp can also have photometric properties that are substantially independent of the arrangement of the lamp and/or the external temperature.

Abstract: A high-pressure discharge lamp and a reflector lamp including a discharge vessel enclosing a discharge space which is provided with an ionizable filling comprising one or more halides. The discharge vessel is substantially constituted by a ceramic material having first and second end portions. Current-supply conductors issue through each end portion to respective electrodes arranged in the discharge space so as to maintain a discharge. At least one of the current-supply conductors is formed as a rod including iridium. The rod is directly sealed to the ceramic material.

Abstract: The invention provides a metal halide lamp 1 wherein the concentration of the filling components fulfill a condition according to claim 1. Such a lamp is found to be a good alternative to existing high-pressure discharge lamps (Ceramic Discharge Metal halide lamps) based on rare earth fillings or other metal halide fillings. In addition, such a lamp can be dimmed without a substantial shift of the color point. Such a lamp can also have photometric properties that are substantially independent of the arrangement of the lamp and/or the external temperature.

Abstract: The invention relates to a ceramic burner (16), a ceramic metal halide lamp, and a method of sealing the ceramic burner. The ceramic burner comprises a discharge vessel (22) enclosing a discharge space (24) that is provided with an ionizable filling comprising one or more halides. The discharge vessel comprises a ceramic wall (30) arranged between a first and a second end portion (41, 42). The first and the second end portion are arranged such that current supply conductors (51, 52) are passed through the end portions to respective electrodes (53, 54) arranged in the discharge space for maintaining a discharge. The ceramic wall of the discharge vessel comprises a tube (66) for introducing the ionizable filling into the discharge vessel during manufacture of the ceramic burner. The tube projectes from the ceramic wall and is provided with a gastight seal (76).

Abstract: The invention relates to a high-pressure discharge lamp (12), and a reflector lamp. The high-pressure discharge lamp has a discharge vessel (22, 61) enclosing a discharge space (24) which is provided with an ionizable filling comprising one or more halides. The discharge vessel is substantially constituted by a ceramic material (51, 52) having first and second end portions (33, 34). Current-supply conductors (44) issue through each end portion to respective electrodes (42) arranged in the discharge space (24) so as to maintain a discharge. At least one of the current-supply conductors is formed as a rod (44) comprising iridium. The rod is directly sealed to the ceramic material. Use of the iridium rod which is directly sealed to the ceramic material has the effect that the interface between the rod and the ceramic material is strong and substantially free from cracks, resulting in a longer lifetime of the high-pressure discharge lamp.