A fluorescent lamp including a glass bulb that is in a shape of a tube.
External electrodes are formed as conductive layers each of which covers
an outer surface of the glass bulb at an end thereof. Metal members in a
shape of a cap are respectively connected to the external electrodes by
covering at least part of the external electrodes. The metal members are
formed such that rims of the metal members recede from a center of the
glass bulb in the tube axis direction a distance L than rims of the
external electrodes.