The present invention provides a metal halide lamp in which the change of
the color temperature is suppressed regardless of the orientation of the
light emitting bulb in use. The metal halide lamp includes a light
emitting bulb of translucent ceramics that includes a light emitting
portion and tubular portions that are connected to the light emitting
portion. The light emitting portion includes a liquid holding portion on
the inner surface of the light emitting portion so as to hold a liquefied
substance that moves on the inner surface toward one of the tubular
portions. The internal diameter d of the light emitting bulb at the
liquid holding portion satisfies 0.4D