A METHOD OF OPERATING AN ARC DISCHARGE LAMP AND A LAMP IN WHICH A SALT RESERVOIR SITE IS LOCALLY COOLED TO PROVIDE A CONDENSATION SITE FOR IODINE REMOTE FROM THE LAMP'S ELECTRODES

摘要

A method of operating an arc discharge lamp and a lamp in which a lighttransmissive envelope encloses electrode tips, a salt and a fill that includesiodine, and inwhich after turning the lamp off, a first part of the light transmissiveenvelope is locallycooled relative to other parts of the light transmissive envelope to provide acondensationsite for the iodine that is spaced from the electrode tips, the first part ofthe lighttransmissive envelope being where a salt reservoir forms and where the salt iscooled bythe local cooling. The local cooling may be provided by an indentation in anouter sleevearound the light transmissive envelope, where the indentation contacts thefirst part toprovide a heat sink.