Patent ID: 6992446

Claim:
A halogen lamp of a 12V type, comprising: a glass part, a portion of which is a light emitting portion having a space therein and the rest of which is a sealing portion, both portions being made of quartz glass; an infrared reflective coating formed to cover an outer surface of the glass part; a filament which, supported by the sealing portion, is provided in the inner space of the light emitting portion; a molybdenum foil which is embedded in the sealing portion and is electrically connected to the filament; and a power supply line, one end of which is connected to the molybdenum foil, the other end being exposed to outside the glass part, wherein 450 mm 2 ≦Sb≦650 mm 2 and Se≧−0.35Sb+520 mm 2 , in which Sb designates an outer surface area of the light emitting portion and Se designates an outer surface area of the sealing portion, are satisfied.