FLUORESCENT LAMP

PURPOSE:To provide a luminous characteristic in which a shade can be seen beautifully in the psychological sense of eyesight to further obtain a comfortable environment of illumination, when the shade is mounted to an illuminator and evaluated. CONSTITUTION:This fluorescent lamp is such that its color temperature is in a range from 4,800K to 5,200K, further in the drawing of x, y chromaticity, chromatic coordinates are provided in a tetragon four points x1=0.351, y1=0.357, x2=0.352, y2=0.363, x3=0.340, y3=0.348 and x4=0.340, y4=0.354. While as a fluorescent material, a halophosphoric acid salt fluorescent material activated by antimony and manganese or its mixture with a halophosphoric acid salt fluorescent material activated by antimony is used.