Mercury-free discharge lamp having a translucent discharge vessel
First Claim
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1. A mercury-free discharge lamp comprising:
- a translucent discharge vessel which has a discharge space into which electrodes protrude for generating a gas discharge, said discharge space having a volume in the range from 17 mm3 to 22 mm3;
wherein metal halides and ignition gas are contained in the discharge space,wherein the metal halides are present in a quantity in the range from 5 milligrams to 15 milligrams per 1 milliliter of discharge space volume in the discharge space;
wherein the discharge vessel is enveloped by a translucent outer bulb, wherein an intermediate space between outer bulb and discharge vessel is filled with a gas or gas mixture having a lower thermal conductivity than air and having a pressure less than 1 bar;
wherein the mercury-free discharge lamp has a luminous flux less than 2000 lm; and
wherein, after termination of its ignition and startup phase, the electrical power of the mercury-free discharge lamp is less than 30 Watts.
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Abstract
A mercury-free discharge lamp with an electrical power consumption of less than 35 Watts may include a translucent discharge vessel which has a discharge space into which electrodes protrude for generating a gas discharge, wherein metal halides and ignition gas are contained in the discharge space, wherein the metal halides are present in a quantity in the range from 5 milligrams to 15 milligrams per 1 milliliter of discharge space volume in the discharge space.
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10 Claims
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1. A mercury-free discharge lamp comprising:
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a translucent discharge vessel which has a discharge space into which electrodes protrude for generating a gas discharge, said discharge space having a volume in the range from 17 mm3 to 22 mm3; wherein metal halides and ignition gas are contained in the discharge space, wherein the metal halides are present in a quantity in the range from 5 milligrams to 15 milligrams per 1 milliliter of discharge space volume in the discharge space; wherein the discharge vessel is enveloped by a translucent outer bulb, wherein an intermediate space between outer bulb and discharge vessel is filled with a gas or gas mixture having a lower thermal conductivity than air and having a pressure less than 1 bar; wherein the mercury-free discharge lamp has a luminous flux less than 2000 lm; and wherein, after termination of its ignition and startup phase, the electrical power of the mercury-free discharge lamp is less than 30 Watts. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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Specification