| 摘要 |
PROBLEM TO BE SOLVED: To provide a signal capable of satisfying respective designated chromaticity standard ranges of a red color, a blue color, and a white color while responding to long lifetime and energy saving.SOLUTION: A red filter part 48 has a red filter range 57 located in the surrounding of a first penetration zone 56 for penetrating visible light and roughly intercepting visible light having a wavelength of 440-540 nm and penetrating visible light having a wavelength of 640 nm or above. A blue filter part 49 has a blue filter range 63 located in the surrounding of a second penetration zone 62 for penetrating visible light and roughly intercepting visible light having a wavelength of 580-620 nm and penetrating visible light having a wavelength of 460-500 nm. Bulb-shaped lamps 15 located on respective back faces of the red filter part 48 and the blue filter part 49 have semiconductor light-emitting elements 35, and a light-emitting spectrum of each lamp has at least two peak wavelengths such as a first peak wavelength of 530±20 nm, and a second peak wavelength of 630±30 nm. |
