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Ultraviolet cold cathode florescent lamp

The present invention is related to a UV CCFL lamp, and more particularly, to a UV CCFL lamp for curing a nail gel with a UVA irradiation having a peak wavelength of such as 366 nm or 368 nm in the field of nail art. In order to provide a UV CCFL lamp capable generating ultraviolet light of high intensity and uniform lighting with great electrical safety and reliability, the UV CCFL lamp of the present invention comprises a translucent hermetic envelope configured to enclose a discharge medium and a UV-excited phosphor to generate the desired UV irradiation preferably in the UVA spectrum range. The discharge medium is preferably to be a mercury-ion vapor and distributed throughout and sealed within the lamp envelope to be excited to a plasma state and for producing a first emission spectrum of a UVC wavelength during operation; and the phosphor in contact with the mercury-ion vapor plasma preferably comprises a composition of either europium-doped boron strontium oxide (B4SrO7:Eu+) or europium-doped strontium fluoborate (SrFB2O3.5:Eu2+) for producing said UV irradiation in response to said first emission spectrum of the discharge medium. To provide a uniform UV irradiation output from the UV CCFL lamp of the present invention, the phosphor is advantageously prepared to be of a mean grain size of 8.5μm±3μm for SrFB2O3.5:Eu2+ and of 15μm±3μm for B4SrO7:Eu+.
Owner:COSMEX
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