A double-ended high intensity discharge lamp includes a luminous tube and reflective layer covering at a reflective portion provided on at least a portion of aid luminous tube for reflecting light emitted from an illuminator supported in the luminous tube towards the reflective portion to project towards another opposing side of the luminous tube.

A double-ended high intensity discharge lamp includes a luminous tube which comprises an inner tube and an outer tube. At least one electrical member is securely fastened inside the luminous tube and at least one illuminator supported inside the luminous tube with a distributor connected with the electrical member to receive power and supply the illuminator. The outer tube is another protective shield to stop spreading in explosion of the illuminator.

A lamp comprising an envelope (1) of quartz glass surrounding the light source of the lamp is described, wherein an electric conductor (8), for example, an electrode rod, is at least partly embedded in the quartz glass material of the envelope (1). At the conductor (8) is provided with protrusions (15) forming a brush-like structure at this surface. The protrusions (15) preferably have an average length of between 10 m and 35 m.

A processor controlled induction RF fluorescent lamp, where the control processor runs a load control algorithm at least for switching the electrical load for connection to an external dimming device, the lamp comprising a vitreous envelope filled with an ionizable gas mixture; a power coupler comprising at least one winding of an electrical conductor; and an electronic ballast providing appropriate voltage and current to the power coupler.

The present invention relates to a radiation generating tube. The radiation generating tube includes an envelope including an insulating tubular member having at least two openings, a cathode connected to one of the openings of the insulating tubular member, and an anode connected to the other of the openings of the insulating tubular member. At least one of the cathode and the anode and the insulating tubular member are bonded at a bonded portion with an electrically conductive bonding member; and the bonded portion bonded with the electrically conductive bonding member is coated with a dielectric layer.

The present invention relates to a radiation generating tube. The radiation generating tube includes an envelope including an insulating tubular member having at least two openings, a cathode connected to one of the openings of the insulating tubular member, and an anode connected to the other of the openings of the insulating tubular member. At least one of the cathode and the anode and the insulating tubular member are bonded at a bonded portion with an electrically conductive bonding member; and the bonded portion bonded with the electrically conductive bonding member is coated with a dielectric layer.

A double-ended ceramic metal halide lamp includes a luminous tube; at least two illuminators serially connected with each other deposed inside the luminous tube; and at least one ring-shaped retainers arranged between two illuminators to support the illuminators located along a central line of the luminous tube. A manufacturing method for a ceramic metal halide lamp includes following steps: (1) Arrange at least two serially connected illuminators inside an interior of a luminous tube; (2) Seal two ends of the luminous tube by a press sealing technique; and (3) Extract out the gas inside the luminous tube to form an eyelet at a central portion of the luminous tube.

A method of manufacturing a high-pressure discharge lamp, comprising the steps of: inserting a mount into an interior of a glass tube having an outer diameter smaller than an inner diameter of an end part of a sealed container; radially constricting the glass tube at a first position located away from a metallic foil toward a tip of an electrode; sealing the mount by a region of the glass tube that ranges from the first position to at least the other end of the metallic foil; protruding the electrode out of the glass tube located away from the first position toward the tip of the electrode to form a glass-tube air-tightly sealed mount; inserting the sealed mount into the end part of the sealed container; and radially constricting the end part of the sealed container to sealing the glass tube of the sealed mount by the end part.

The invention describes an electrode (1) for use in a lamp (3) comprising a quartz glass envelope (30) enclosing a chamber (31), which electrode (1) comprises a tip for extending into the chamber (31) and base for embedding in a sealed portion (33) of the quartz glass envelope (30), characterized in that the base comprises a plurality of essentially smooth concave channels (2) arranged around the body of the electrode (2) and wherein the depth (d.sub.ch) of a channel (2) is preferably at most 8 percent, more preferably at most 5 percent, most preferably at most 3 percent of a diameter (D.sub.e) of the electrode (2). The invention further describes a method of manufacturing an electrode (1) for use in a lamp (3) comprising a chamber (11) in a quartz glass envelope (30), which method comprises the step of removing material from the body of the electrode (1) to form a plurality of channels (2) around the body of the electrode such that a channel (2) comprises channel side walls (62) and an essentially concave channel floor (60), and such that depth (d.sub.ch) of a channel (2) is preferably at most 8 percent, more preferably at most 5 percent, most preferably at most 3 percent of a diameter (D.sub.e) of the electrode (2). The invention also describes a lamp (3) comprising such electrodes (1), and a method of manufacturing such a lamp (3).

Provided is an apparatus for sealing an arc-tube including a jig body including an electrode pin hole into which an end part of the electrode pin inserted into a bypass tube part of the arc-tube is inserted and a connection path connected with the electrode pin hole; and a pressurizing means inserted into the connection path to pressurize and fix the electrode pin positioned at the electrode pin hole. Therefore, the apparatus for sealing an arc-tube can more easily and stably fix the electrode pin during a sealing process.