| 摘要 |
PURPOSE:To obtain a fluorescent lamp with good color rendering property and higher luminous efficiency by providing the color temperature K of a luminous color in the range of 3,000K<=k<=3,500K and an average color rendering index Ra in the range of 75<=Ra<=85. CONSTITUTION:In a fluorescent lamp obtained by depositing, on a glass valve inner wall, a mixed phospor substance containing a phorphor substance emitting a light in the green region with a main luminescent wavelength in the range of 530-570nm and a phosphor substance emitting a light in the red region with a main luminescent wavelength in the range of 600-640nm, the color temperature k of a luminous color is in the range of 3,000K<=k<=3,500K and an average color redering index Ra in the range of 75<=Ra<=85. |
