Patent ID: 7795814

Claim:
An intermediate arrangement for an arc discharge metal halide lamp useable in providing visible light, the lamp comprising: an arc discharge vessel formed of a visible light transmissive structure which defines a discharge region containing ionizable materials including a metal halide material and which has capillary tubes therein having a selected tube outside width between outside tube surface locations on opposite sides thereof and with a first electrical feedthrough positioned to extend through an interior passageway from a tube outer end in a corresponding one of the capillary tubes to have an interior end of that electrical feedthrough positioned in the discharge region opposite an interior passageway of the other capillary tube and an exterior end thereof positioned outside the outer end of the corresponding capillary tube, the interior passageway thereof having a selected tube inside width between inside interior passageway surface locations on opposite sides thereof; and the first electrical feedthrough having a cermet material portion thereof affixed to an end of an exterior electrical conductor portion thereof along an axis intersecting each that is parallel to the extent of the corresponding capillary tube, and with the exterior electrical conductor portion having a selected exterior conductor outside width between outside exterior electrical conductor surface locations on opposite sides thereof that is less than the tube outside width but greater than the tube inside width, and a bonding material closed loop positioned about the end of the exterior electrical conductor portion such that the bonding material closed loop has no portion thereof extending past the outside tube surface locations of the corresponding capillary tube by more than thirty-five percent of the tube outside width.