The invention discloses an efficient ceramic lamp, which comprises a discharging chamber, electrode tubes arranged at the two sides of the discharging chamber, and electrode assemblies extending into the discharging chamber through the electrode tubes, wherein the electrode tube comprises an inner tube section and a welding groove which are connected with each other, and the inner tube section isclose to the discharging chamber; the welding groove is positioned on the end face, and the inner diameter of the welding groove is larger than that of the inner tube section; the welding groove realizes the gas-proof sealing of the discharging chamber by filling solder, and the electrode assembly comprises a tungsten mandrel, a conducting rod and a lead or a conducting tube which are sequentially connected; the tungsten mandrel extends into the discharging chamber, and the conducting rod is positioned at the inner tube section; and the outer diameter of the conducting rod is equal to the inner diameter of the inner tube section, and the lead is connected with the tail end of the conducting rod and penetrates through the solder in the welding groove to extend out of the electrode tube, orthe conducting tube penetrates through the solder in the welding groove and extends out of the electrode tube to be connected with the lead. The invention effectively improves luminous efficiency andsealing effect.