| 摘要 |
PROBLEM TO BE SOLVED: To provide a fluorescent lamp which can be manufactured in an inexpensive manner in view of the cost and which enables the reduction in color difference at tube ends.SOLUTION: A fluorescent lamp comprises: a glass tube; electrodes at opposing ends of the glass tube; and a phosphor layer provided on an inner face of the glass tube. The phosphor layer includes a phosphor layer making the first layer on the side of the glass tube, and a phosphor layer making the second layer on the side of a discharge space. As the first layer composed of the phosphor layer, a phosphor layer including a calcium halophosphate phosphor as a primary component is provided. As the second layer composed of the phosphor layer, a phosphor layer including a rare earth-activated phosphor as a primary component is provided. The viscosity of a fluorescence coating material used in producing the second layer composed of the phosphor layer is 110 mPas or larger.SELECTED DRAWING: Figure 2 |
