A lighting device (3000; 100; 200; 400; 500; 700; 300; 1600), comprising: a light source (110; 210; 410; 510; 710; 310; 810) for generating a blue excitation light (3001; 811); a base board (3030; 130; 230; 430; 530; 630; 730; 330; 830) which comprises at least one sector located in the light path of the excitation light, a wavelength conversion material layer (3040; 140; 240; 440; 540; 640; 740; 340; 840) covering a sector, wherein the wavelength conversion material layer (3040; 140; 240; 440; 540; 640; 740; 340; 840) absorbs a part of the blue excitation light (3001; 811) and emits a converted light; a first light filter (250; 450; 550; 350; 850) located in an output light path of the wavelength conversion material layer (3040; 140; 240; 440; 540; 640; 740; 340; 840), which is used to filter the converted light; characterized in that the wavelength conversion material layer (3040; 140; 240; 440; 540; 640; 740; 340; 840) comprise a green phosphor or a cyan phosphor or a yellowish green phosphor or a yellow phosphor or a mixture of multiple kinds of these phosphor, and wherein a mixed light emitted from the first light filter (250; 450; 550; 350; 850) is formed by the converted light and the remaining blue excitation light (3001; 811) which is not absorbed by the wavelength conversion material layer (3040; 140; 240; 440; 540; 640; 740; 340; 840), the color coordinate of the mixed light is closer to a pre-defined blue light color coordinate than the color coordinate of the blue excitation light (3001; 811). a light source (110; 210; 410; 510; 710; 310; 810) for generating a blue excitation light (3001; 811); a base board (3030; 130; 230; 430; 530; 630; 730; 330; 830) which comprises at least one sector located in the light path of the excitation light, a wavelength conversion material layer (3040; 140; 240; 440; 540; 640; 740; 340; 840) covering a sector, wherein the wavelength conversion material layer (3040; 140; 240; 440; 540; 640; 740; 340; 840) absorbs a part of the blue excitation light (3001; 811) and emits a converted light; a first light filter (250; 450; 550; 350; 850) located in an output light path of the wavelength conversion material layer (3040; 140; 240; 440; 540; 640; 740; 340; 840), which is used to filter the converted light; characterized in that the wavelength conversion material layer (3040; 140; 240; 440; 540; 640; 740; 340; 840) comprise a green phosphor or a cyan phosphor or a yellowish green phosphor or a yellow phosphor or a mixture of multiple kinds of these phosphor, and wherein a mixed light emitted from the first light filter (250; 450; 550; 350; 850) is formed by the converted light and the remaining blue excitation light (3001; 811) which is not absorbed by the wavelength conversion material layer (3040; 140; 240; 440; 540; 640; 740; 340; 840), the color coordinate of the mixed light is closer to a pre-defined blue light color coordinate than the color coordinate of the blue excitation light (3001; 811). a first light filter (250; 450; 550; 350; 850) located in an output light path of the wavelength conversion material layer (3040; 140; 240; 440; 540; 640; 740; 340; 840), which is used to filter the converted light; characterized in that the wavelength conversion material layer (3040; 140; 240; 440; 540; 640; 740; 340; 840) comprise a green phosphor or a cyan phosphor or a yellowish green phosphor or a yellow phosphor or a mixture of multiple kinds of these phosphor, and wherein a mixed light emitted from the first light filter (250; 450; 550; 350; 850) is formed by the converted light and the remaining blue excitation light (3001; 811) which is not absorbed by the wavelength conversion material layer (3040; 140; 240; 440; 540; 640; 740; 340; 840), the color coordinate of the mixed light is closer to a pre-defined blue light color coordinate than the color coordinate of the blue excitation light (3001; 811).