The present invention relates to a lamp device using a high-pressure vapor
discharge lamp, particularly to an improvement for controlling the
influence of the generation of heat, which accompanies an increase in lamp
power and a reduction in the size of a reflector. A lamp device of the
present invention comprises a discharge lamp having an arc tube enclosing
luminescent materials and having a pair of opposing electrodes disposed
therein and a pair of sealed portions extending from the arc tube; a
reflector which reflects light radiated by the discharge lamp; a
transparent member covering an open end of the reflector and accommodating
the discharge lamp in a space between the transparent member and the
reflector; and means for preventing an excessive temperature rise wherein
the temperature rise of welded parts of wiring members electrically
connected to the electrodes of the discharge lamp is restricted.
