Abstract:
A lamp includes a discharge vessel and electrodes extending into the discharge vessel. The lamp further includes an ionizable fill sealed within the vessel. The fill includes an inert gas and a halide component. The halide component includes a sodium halide, a thallium halide, at least one of a calcium halide and a strontium halide, and at least one of a rare earth halide. The rare earth (RE) halide is selected from the group consisting of lanthanum, cerium, praseodymium, samarium and neodymium, and combinations thereof. The fill establishes a Na/RE ratio of 8≦Na/RE≦48.
Abstract:
A lamp includes a discharge vessel with electrodes extending into the discharge vessel and an ionizable fill scaled within the vessel. The fill includes a buffer gas, optionally mercury, and a halide component. The lamp includes available oxygen, sealed within the discharge vessel, at a concentration of at least 0.1 μmol O/cc.
Abstract:
A lamp includes a discharge vessel. Tungsten electrodes extend into the discharge vessel. An ionizable fill is sealed within the vessel. The fill includes a buffer gas and a halide component that includes a rare earth halide. A source of oxygen which includes a lanthanide oxide is present in the discharge vessel. The source of oxygen provides oxygen for a regenerative cycle which reduces blackening of the lamp walls by tungsten from the electrodes.
Abstract:
A lamp includes a discharge vessel with electrodes extending into the discharge vessel and an ionizable fill scaled within the vessel. The fill includes a buffer gas, optionally mercury, and a halide component. The lamp includes available oxygen, sealed within the discharge vessel, at a concentration of at least 0.1 μmol O/cc.
Abstract:
A lamp includes a discharge vessel. Tungsten electrodes extend into the discharge vessel. An ionizable fill is sealed within the vessel. The fill includes a buffer gas and a halide component that includes a rare earth halide. A source of oxygen which includes a lanthanide oxide is present in the discharge vessel. The source of oxygen provides oxygen for a regenerative cycle which reduces blackening of the lamp walls by tungsten from the electrodes.