| 简介 |
The object of the present invention is to provide a fluorescent lamp, which does not turn off, even when it is lit in a high-temperature atmosphere. The fluorescent lamp according to the present invention relates to a fluorescent lamp with a pair of hot cathode electrodes at both its ends, wherein a phosphor is formed in a laminated manner on the inner surface of a glass tube and a protection film is formed between the glass tube and the phosphor, characterized in that the residual impure gas in the lamp, including the amount occluded by the phosphor and the protection film, is set to 0.5% or less with the sealed rare gas partial pressure ratio, and the following relationship is fulfilled : G Hg = A x C L A = 0.0032 to 0.163 [mg/cc] where the amount of sealed mercury is G Hg [mg], the lamp internal volume is C L [cc], and the coefficient is A [mg/cc]. |
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