Patent ID: 6459197
Filing Date: 2002-10-01
Classification: H01J

Abstract:
A fluorescent lamp comprising a phosphor layer containing a blue phosphor having an emission peak in a 440 to 470 nm wavelength range, a green phosphor having an emission peak in a 505 to 530 nm wavelength range, a green phosphor having an emission peak in a 540 to 570 nm wavelength range, and a red phosphor having an emission peak in a 600 to about 611 nm wavelength range, whereina ratio I1/I2 of an emission peak energy I1, in a wavelength range of 505 to 530 nm to an emission peak energy I2 in a wavelength range of 540 to 570 nm is not less than 0.06, a correlated color temperature of the lamp is not more than 3700 K, and the phosphor layer does not contain a red phosphor having an emission peak wavelength that is greater than about 611 nm.