Patent ID: 8110969

Claim:
A gas-discharge reflector lamp, comprising a burner installed on current leads into the bulb, at least half of the bulb's inner surface is covered with a reflective layer so that the plane passing through the layer's longitudinal edges is parallel to the burner's longitudinal axis; the bulb having an ellipsoidal shape; the reflective layer's lateral edges in the area bound by the bulb neck and dome being located in cross-sections in areas where the bulb neck and dome join the ellipsoidal section; the plane passing through the reflective layer's longitudinal edges being shifted from the bulb axis by a distance H and is within 0.04-0.11 of the bulb's maximum inside diameter D; the burner placed so that, in the cross-section through the bulb's ellipsoid center, the ratio of the distance from the burner axis to the closest surface of the reflective layer to the distance from the burner's axis to the reflective layer's edge L located in the longitudinal section is between 0.56 and 0.68; and at least one current lead is placed between the burner and the reflective layer in the longitudinal symmetry plane.