Patent ID: 6242857
Filing Date: 2001-06-05
Classification: H01J

Abstract:
A fluorescent lamp which produces primary light, the lamp comprising:a green emission phosphor with a peak emission wavelength 530 nm to 560 nm, anda red emission phosphor with a peak emission wavelength at 600 nm to 630 nm;wherein:four test colors for special color rendering index calculation, No. 9, No. 10, No. 11, and No. 12, specified in the Commission Internationale de l'Eclairage CIE Publication No. 13.3, are perceivable as red, yellow, green, and purplish blue, respectively, in terms of Munsell hues;the correlated color temperature of said fluorescent lamp is 3200 K to 4500 K, andthe chromaticity point of the color of said light is located within a chromaticity range where the distance of the color point from the Planckian locus on the CIE 1960 uv chromaticity diagram is not less than 0.015 and not greater than 0.045.