High efficiency vehicle headlights and reflector lamps

A vehicle headlight comprising:

• a reflector defining a cavity, said cavity including a shaped, light-directing surface having a focal point;
• a lens which closes the cavity of said reflector;
• and
• an incandescent lamp capsule mounted within said reflector, said incandescent lamp capsule comprising:
• a hermetically sealed, ellipsoidally-shaped, light-transmissive envelope having a central axis;
• a fill material including an inert fill gas and a halogen additive contained within said envelope;
• a filament sealed in said envelope and supported by lead-in wires, said filament being located at or near the focal point of said reflector and being disposed along or near the central axis of said envelope;
• and
• a specularly reflective coating on a portion of said envelope, said reflective coating being configured to block direct transmission of radiation from said filament to said lens and to portions of said reflector other than said shaped, light-directing surface, and to reflect radiation emitted by said filament back to said filament.