To provide an electrodeless discharge lamp which ensures a mercury vapor pressure within a valve and a lighting device using the same.
A lighting device comprises an electrodeless discharge lamp 1 having a valve 3 composed of translucent materials and filled with rare gas and amalgam, and a coupler 2 wound with an inductive coil 4. A storage concave 31 is formed on an external surface of the valve 3 to house the inductive coil 4, and an exhaust convex 32 to be inserted into the coupler 2 is projected at the bottom of the storage concave 31. An amalgam container 5 storing amalgam is positioned in the exhaust convex 32 with a shift to the insertion side of the coupler 2 into the storage concave 31 rather than the inductive coil 4. The amalgam container 5 is positioned in a location with a relatively high temperature to ensure a mercury vapor pressure within the valve 3.
OKADA ATSUNORI
SAKAI KAZUHIKO
TSUZUKI YOSHINORI
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Atsuo Mori