| 摘要 |
PROBLEM TO BE SOLVED: To provide a fluorescent lamp of which, a joint part jointing a straight tube bulb and a jointing tube is prevented from a generation of crack in advance. SOLUTION: For the fluorescent lamp using a phosphor emitting light of three wave length of red, green, and blue, as a phosphor layer 2 formed to the inner surface of a folded bulb composed of a discharge path formed by connecting one end side of a plurality of straight tube bulbs 1a, having a length of more than 1,000 mm, with a connecting tube 1b respectively, having respective electrodes at the other end side of the straight bulb tube, the blue color phosphor is composed by mixing a first blue color phosphor containing europium activated aluminate of alkali earth metal as a main component, and a second blue color phosphor containing europium activated chlorophosphate of alkali earth metal as a main component.
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