Abstract: A High Intensity Discharge (HID) lamp includes a discharge chamber disposed within an anti-oxidation envelope and protected by a shroud. The shroud encloses the anti-oxidation envelope and thereby the discharge chamber to prevent the emission of fragments in the event that the discharge chamber fails. The shroud is positioned around the anti-oxidation envelope by a compressed spring at one end of the envelope tensioned against a collar attaching the other end of the envelope to a base of the lamp.

Abstract: A High Intensity Discharge (HID) lamp (100) comprised of a discharge chamber (130) disposed within an anti-oxidation envelope (120) and protected by a shroud (110). The shroud encloses the anti-oxidation envelope and thereby the discharge chamber to prevent the emission of fragments in the event that the discharge chamber fails. The shroud is positioned around the anti-oxidation envelope by means of a compressed spring (170) at one end of the envelope tensioned against a collar (160) attaching the other end of the envelope to a base of the lamp.

Abstract: A discontinuous annular metallic holder for a glow starter in a high pressure discharge lamp. The holder has a hexagonal shape and encircles the bulb of the glow starter. One side is welded to one of the current-supply conductors extending from the lamp stem and two of the sides are parallel to the plane of the getters. The lower parallel side closest to the getter plane has an opening extending the length of the side to define an electrical discontinuity and to prevent a continuous circuit path within the lower side. The gap reduces the current induced in the lower side and resultant heating when the holder is subjected to an electromagnetic field during flashing of the getters. The reduced temperature of the lower side prevents damage to the glow starter.