Three electrode ceramic metal halide lamp

摘要

A ceramic body (14) for a discharge vessel includes a central barrel portion (60) and two end plus (64, 66), which close opposite ends of the barrel. Main electrode (32, 34) and an initiator electrode (50) are supplied with power via conductors in leg members (70, 76, 72). In one embodiment, a first electrode (32) and the initiator electrode are supplied with current through two separate leg members. In another embodiment, a dual electrode leg member is provided with two bores.