BULB TYPE FLUORESCENT LAMP AND ILLUMINAIRE

摘要

PROBLEM TO BE SOLVED: To provide a bulb type fluorescent lamp capable of improving a light flux rising characteristic with a simple constitution, even when amalgam for controlling mercury vapor pressure is enclosed.

SOLUTION: The temperature of a part of a light emitting tube projection projecting toward a base side can be set at a temperature having mercury vapor pressure becoming maximum in light emitting efficiency. As a result, the light flux rising characteristic just after turning-on is improved more than when using conventional amalgam low in the mercury vapor pressure, and reduction in the light emitting efficiency in turning-on can also be restrained.

COPYRIGHT: (C)2008,JPO&INPIT