| 摘要 |
PURPOSE:To obtain a fluorescent lamp having compact size, high power, and high emitting efficiency by forming a part of wall which forms an electrode compartment with a good heat conductor which is exposed outside. CONSTITUTION:A radiator 6 comprising chrome steel is installed in a part of wall of an electrode compartment. The heat generated in a discharge space during lighting is mostly radiated on the outer surface of the radiator 6 comprising chrome steel which is a good heat conductor. The discharge space side of the radiator 6 is cooled to the lowest temperature in the discharge space, and mercury sealed inside is condensed on the discharge space side. Mercury vapor pressure in the discharge space is controlled only by the temperature of the discharge space side which is the coolest part. Mercury vapor pressure in the discharge space is not increased even if the diameter of a glass tube 1 is made small and a load of the tube wall is increased. Therefore, light emitting efficiency is not decreased and flickering generated near the electrode does not appear outside. |
