HID LAMP WITH MULTIPLE DISCHARGE DEVICES

摘要

HID lamp with multiple discharge devices. The invention concerns a high intensity discharge lamp comprising a pair of elongated discharge devices within an outer envelope. Each of the discharge devices has one end that operates at a higher temperature than the other end. Mounting means is provided for mounting the discharge devices with the higher temperature operating end of one of them proximate the lower temperature operating end of the other discharge device, for heating the lower temperature operating end of the other discharge device when it is inoperative.