Shrouded discharge lamp with reduced arcing

摘要

A discharge lamp (100) such as a shrouded metal halide lamp is designed to reduce the potential for arcing under hot restart or restrike voltages. A stepped configuration of the pinch seal (132) region limits arcing within the shroud (130) while stems (178,180) extend different dimensions into the base cavity and are received in respective recesses (164,166), thus increase the distance between outer lead wires (154,156) in the base (170) to prevent arcing externally of the shroud (130).