LAMP HOUSE

摘要

PROBLEM TO BE SOLVED: To provide a lamp house capable of restraining temperature rise in lighting a lamp to prevent the temperature from rising above a heat resisting temperature of the lamp.

SOLUTION: This lamp house consists of: the lamp having a lamp positive electrode and a lamp negative electrode mounted to both ends of a tube part for extracting light from one end of the tube part; a lamp house positive electrode and a lamp house negative electrode used for supplying power to the lamp positive electrode and the lamp negative electrode and supported by an insulating material having a coolant passage inside; a conductive lamp cap with the lamp positive electrode mounted; and a conductive positive electrode holder contacting the lamp cap. The contact area between the lamp cap and the positive electrode holder is set ≥1/3 as much as the total bottom area on the lamp positive electrode side.

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