An electrodeless discharge lamp with one or more stationary light emitting bulbs inside a common conductive shield to confine an electromagnetic excitation field provided by a plurality of sources. Each bulb can be excited by several electromagnetic radiation sources or by an individual electromagnetic radiation source. Tubular realization of the lamp, with two magnetron or transistor electromagnetic sources facing each other at the extremity of a tubular bulb, are particularly suitable for installation at the focal line of parabolic trough reflector. Some variants combine bulbs of different compositions, and excitation levels can be independently set to control the spectrum of emitted light.

A ceramic metal halide lamp includes a luminous tube; an illuminating arrangement having at least two illuminators serially connected with each other and deposed inside the luminous tube; and at least one retainer having at least contacting one end being contacted with an inner surface of the luminous tube to support the illuminators being stability located at a predetermined position inside said luminous tube, wherein the two illuminators are serially connected with each other along a central line of said luminous tube.

A discharge lamp and a method for forming the lamp, the lamp including a ceramic discharge vessel defining at least part of a cavity containing a metal halide (MH) chemical filling having a power factor of between about 0.75 and 0.85 located within the cavity; and one or more feedthroughs having first and second ends, the first end located in the cavity. The cavity may have an internal length LINT and an internal diameter DINT that are proportional to each other, such that an aspect ratio defined as LINT/DINT is less than or equal to two. The lamp may be started and operated with a probe-start ballast without an internal igniter circuit or without a starting electrode (or internal igniter).

An electrode arrangement for a discharge lamp is provided, including an electrode unit including an electrode and an electrode plate, and a conductive connection unit for coupling to an energy source. The connection unit includes a connection unit plate. The arrangement includes a cylinder composed of a nonconductive material, said cylinder arranged between the electrode plate and the connection unit plate, and at least one conduction film which is arranged on an outer side of the cylinder and extends from the connection unit plate as far as the electrode plate and connects the connection unit plate and the electrode plate to one another. The arrangement includes a cap-shaped and integrally embodied protective film arranged on the electrode plate or connection unit plate, such that the film covers a plate side facing away from the cylinder and an outer lateral surface of the electrode plate or of the connection unit plate.

The present disclosure relates to the technical field of electric light sources, particularly to a metal halide lamp and a manufacturing method thereof. The metal halide lamp includes an electric arc tube, an inner glass bulb, and a lamp holder fixedly connected with the inner glass bulb; the electric arc tube includes a tube body, a positive electrode located inside an electric arc cavity of the tube body and connected with a positive feedthrough inserted in a first leg portion of the tube body, and a negative electrode connected with a negative feedthrough inserted in a second leg portion of the tube body; the electric arc cavity is provided therein with an ignition gas; an outer surface of the first leg portion is provided with a conductive layer and a metal electrical connector, wherein the conductive layer has one end close to and the other end away from an electrode tip of the positive electrode, the metal electrical connector has one end connected with the other end of the conductive layer, and the other end connected with a long molybdenum rod. Security risks in manufacturing, transportation, mounting, utilization, storage, and waste disposal brought about by use of the radioactive material .sup.85Kr are avoided in the present disclosure.

A mercury-free high-pressure metal-halide ultraviolet gas-discharge lamp comprising a primary filling of at least one of osmium, germanium and tellurium, and a secondary filling comprising at least one of tin, antimony, indium, tantalum and gold. In a preferred embodiment, the primary filling is TeI2 and the secondary filling is SbI3.

An electrode arrangement for a discharge lamp is provided, including an electrode unit including an electrode and an electrode plate, and a conductive connection unit for coupling to an energy source. The connection unit includes a connection unit plate. The arrangement includes a cylinder composed of a nonconductive material, said cylinder arranged between the electrode plate and the connection unit plate, and at least one conduction film which is arranged on an outer side of the cylinder and extends from the connection unit plate as far as the electrode plate and connects the connection unit plate and the electrode plate to one another. The arrangement includes a cap-shaped and integrally embodied protective film arranged on the electrode plate or connection unit plate, such that the film covers a plate side facing away from the cylinder and an outer lateral surface of the electrode plate or of the connection unit plate.

The present disclosure relates to the technical field of electric light sources, particularly to a metal halide lamp and a manufacturing method thereof. The metal halide lamp includes an electric arc tube, an inner glass bulb, and a lamp holder fixedly connected with the inner glass bulb; the electric arc tube includes a tube body, a positive electrode located inside an electric arc cavity of the tube body and connected with a positive feedthrough inserted in a first leg portion of the tube body, and a negative electrode connected with a negative feedthrough inserted in a second leg portion of the tube body; the electric arc cavity is provided therein with an ignition gas; an outer surface of the first leg portion is provided with a conductive layer and a metal electrical connector, wherein the conductive layer has one end close to and the other end away from an electrode tip of the positive electrode, the metal electrical connector has one end connected with the other end of the conductive layer, and the other end connected with a long molybdenum rod. Security risks in manufacturing, transportation, mounting, utilization, storage, and waste disposal brought about by use of the radioactive material .sup.85Kr are avoided in the present disclosure.

A mercury-free high-pressure metal-halide ultraviolet gas-discharge lamp comprising a primary filling of at least one of osmium, germanium and tellurium, and a secondary filling comprising at least one of tin, antimony, indium, tantalum and gold. In a preferred embodiment, the primary filling is TeI2 and the secondary filling is SbI3.

The preferred embodiments are directed to discloses a metal halide high-pressure discharge lamp comprising a burner which is enclosed by an outer bulb. In the outer bulb samarium is provided.