Abstract: 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).

Abstract: 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).

Abstract: A ceramic gas discharge metal halide (CDM) lamp (10) capable of retrofitting into existing high pressure iodide (HPI) metal halide and high pressure mercury vapor (HP) lamp fixtures for significient energy savings, the CDM lamp (10) having a ceramic discharge vessel (12) containing a pair of discharge electrodes (17, 18), a Penning mixture of the rare gases neon and argon, and a chemical fill which includes an oxygen dispenser and which restricts strong oxygen binders to 5 mole percent or less. In a preferred embodiment, the discharge vessel (12) has an aspect ratio R of less than 2, a wall thickness t of up to 1.2 mm, a spacing d between the discharge electrodes (17, 18) of up to 14 mm, and a passive antenna (26) on the outer wall of the discharge vessel (12), with the shortest distance a between a discharge electrode (17, 18) and the floating antenna (26) of up to 7 mm.

Abstract: A quartz metal halide lamp includes an outer sealed envelope defining an interior space, and an arc tube disposed in the interior space. The arc tube has a fill space. A chemical fill is disposed in the fill space. The chemical fill includes sodium halide and lanthanide halide, with the lanthanide halide selected from the group consisting of europium iodide, europium bromide, praseodymium iodide, praseodymium bromide, ytterbium iodide, ytterbium bromide and combinations thereof. The lanthanide halide is between 2 and 6 weight percent of the chemical fill. Electrodes are partially disposed within the fill space.

Abstract: An HID lamp with a canted arc tube including a high intensity discharge (HID) lamp with an outer envelope (1) having a neck portion (34) and a lamp axis (32); a frame (9) having first frame section (9a), second frame section (9b), third frame section (9c), the first frame section (9a) being pivotably connected to the second frame section (9b) in a first connection, and the second frame section (9b) being pivotably connected to the third frame section (9c) in a second connection; and an arc tube (4) having an arc tube axis (33) attached to the second frame section (9b). At least one of the first connection and the second connection is a deformable connector (130, 132) paired with a rotary joint (21, 23); and the arc tube axis (33) forms a predetermined angle with the lamp axis (32) when the frame (9) is in a final configuration.

Abstract: A ceramic metal halide lamp (1) of the present invention has a ceramic discharge tube (3) and two electrodes (4, 5) mounted in an outer glass envelope (2). The discharge tube (3) is filled with mercury, a starting gas such as xenon and a mixture of metal iodides including in weight percent (wt. %): about 5-35% sodium iodide, about 1-6% thallium iodide, about 55-86% thulium iodide and/or dysprosium iodide, about 0-15% calcium iodide and about 0-31% of dysprosium and/or holmium iodide. The lamp has a light output characterized by a relatively high color temperature (around 5000K or higher), making it suitable for use as a daylight lamp.

Abstract: A compact open-rated HID lamp (10) having a shrouded arc tube (12) positioned within a compact outer envelope (28), which lamp (9) has an arc tube mounting assembly (30) characterized by a long lead wire (32) which extends from the press seal (29) at the base end (28A) of the outer envelope (28), winds helically around the shroud (26) and extends into and is biased outwardly against the distal end (28B) of the outer envelope (28), thus not only conducting current to the distal electrode (24) of the arc tube (12), but also centering and supporting the retaining shroud (26) and supplementing the shroud's retainment function with minimal parts and minimal wire connections. In addition, arc displacement is minimized, leading to higher lumen maintenance and longer lifetimes.

Abstract: A medium wattage (>175 W to 400 W) metal halide electric lamp is provided having a strapless mount structure for the light source capsule while reliably passing standard drop tests. The strapless mount structure reduces photoelectron emission and thus retards sodium diffusion through the light source capsule.

Abstract: A quartz metal halide lamp (10) including an outer sealed envelope (15) defining an interior space (13) and an arc tube (30) disposed in the interior space (13), the arc tube (30) having a fill space (31). A chemical fill is disposed in the fill space (31). The chemical fill includes sodium halide and lanthanide halide, with the lanthanide halide selected from the group consisting of europium iodide, europium bromide, praseodymium iodide, praseodymium bromide, ytterbium iodide, ytterbium bromide and combinations thereof. The lanthanide halide is between 2 and 6 weight percent of the chemical fill. Electrodes (21, 22) are partially disposed within the fill space (31).

Abstract: A discharge lamp employs an arc tube (30), an outer bulb envelope (20), and a floating mount structure for mounting the arc tube within the outer bulb envelope. The floating mount structure employs a metal strap (60, 61) engaging a pinch (31, 32) of the arc tube and a frame wire (41-43) electrically connected to an electrode extending through the pinch. The metal strap is electrically isolated from the frame wire to thereby impede a production of photoelectrons by the metal strap when the lamp is in operation. The electric isolation of the metal strap from the frame wire can be established by electrically insulating (100) any connection of the metal strap to the frame wire and by establishing an air gap (AG1) between any unconnected portions of the metal strap and the frame wire.

Abstract: An improved discharge lamp is provided which includes a discharge vessel (arc tube) enclosing a discharge space, the discharge vessel (arc tube) including within the discharge space a metal halide ionizable material; first and second discharge electrode feedthroughs, and first and second current conductors connected to the first and second discharge electrode feedthroughs, respectively. The improvement is through the use of a field wire of a material that includes Ni or Ni alloy, and wherein the field wire material exhibits an electrical resistivity at 25° C.<10 ohms/mm2; a photoelectric emission work function>4.0 eV; a thermionic emission work function>4.0 eV; and a melting point>1200° C.

Abstract: An improved discharge lamp is provided which includes a discharge vessel (arc tube) enclosing a discharge space, the discharge vessel (arc tube) including within the discharge space a metal halide ionizable material; first and second discharge electrode feedthroughs, and first and second current conductors connected to the first and second discharge electrode feedthroughs, respectively. The improvement is through the use of a field wire of a material that includes Ni or Ni alloy, and wherein the field wire material exhibits an electrical resistivity at 25° C.<10 ohms/mm2; a photoelectric emission work function>4.0 eV; a thermionic emission work function>4.0 eV; and a melting point>1200° C.

Abstract: High lumen output quartz metal halide lamps are provided which comprise a vacuum outer fill, and a silicon nitride CVD coating on the outside of the quartz arc tubes (discharge tubes). Instead of nitrogen filled outers, vacuum lamp outers are used to reduce energy loss (since heat conduction loss is reduced) and to increase lumen output. Additionally, only the outside of the arc tubes is coated with silicon nitride, without coating the metal components. This reduces or blocks sodium diffusion through the quartz walls. The silicon nitride coating also retards migration of the trace hydrogen from the lamp outer into the arc tube. At least about a 10% increase, and preferably a 15% increase in lumen output is realized by using a vacuum lamp outer instead of the nitrogen fill outer conventionally used for the traditional quartz fill lamps. The heat conduction loss is reduced and the lamp efficiency is increased significantly.

Abstract: High lumen output quartz metal halide lamps are provided which comprise a vacuum outer fill, and a silicon nitride CVD coating on the outside of the quartz arc tubes (discharge tubes). Instead of nitrogen filled outers, vacuum lamp outers are used to reduce energy loss (since heat conduction loss is reduced) and to increase lumen output. Additionally, only the outside of the arc tubes is coated with silicon nitride, without coating the metal components. This reduces or blocks sodium diffusion through the quartz walls. The silicon nitride coating also retards migration of the trace hydrogen from the lamp outer into the arc tube. At least about a 10% increase, and preferably a 15% increase in lumen output is realized by using a vacuum lamp outer instead of the nitrogen fill outer conventionally used for the traditional quartz fill lamps. The heat conduction loss is reduced and the lamp efficiency is increased significantly.