A mount assembly for a lamp has a glass stem (122) having a first portion (124) that is tubular and has an outside diameter D2 and a second portion (118) formed as a pinch seal A blow-hole 125 is formed in the tubular fist portion and is connected to an exhaust tubulation 126, A substantially C-shaped clip (100) is mounted upon the first portion (124). The C-shaped clip (10) has an inside diameter D that is smaller than the outside diameter D2 whereby the clip (100) frictionally engages the first portion (24). A pair of substantially oppositely located cutouts (102, 104) is formed in the clip (10), each providing an extending flap (106, 108) projecting away from the clip (100). This assembly accurate supports the structure and prevents rotation of the mount assembly. An upstanding tab (110) is located substantially mid-way between the extending flaps, i.e., opposite the open part of the clip, and angled inwardly toward the center of the C-shaped clip (100). The tab (110) is provided with a hooked end (112) which engages the blow-hole (125) and fixes the position of the clip (100) both vertically and rotationally.