Adjustment method for light emitting system and light emitting system

A light emitting system, comprising:

• a first light emitting element, providing a first colored light, represented by a first color coordinate on the 1931 CIE chromaticity diagram, with a chromaticity x value of 0.16-0.22 and a chromaticity y value of 0.23-0.3, and when a wavelength of the first colored light is between 450 nm and 460 nm, emission intensity of the first light emitting element is more than or equal to 80% of maximum emission intensity of the first light emitting element;
• a second light emitting element, providing a second colored light, represented by a second color coordinate on the 1931 CIE chromaticity diagram, with a chromaticity x value of 0.37-0.47 and a chromaticity y value of 0.36-0.43, and when a wavelength of the second colored light is between 620 nm and 640 nm, emission intensity of the second light emitting element is at maximum emission intensity of the second light emitting element;
• a third light emitting element, providing a third colored light, represented by a third color coordinate on the 1931 CIE chromaticity diagram, with a chromaticity x value of 0.53-0.6 and a chromaticity y value of 0.4-0.45, and when a wavelength of the third colored light is between 590 nm and 630 nm, emission intensity of the third light emitting element is more than or equal to 80% of maximum emission intensity of the third light emitting element;
• a fourth light emitting element, providing a fourth colored light, represented by a fourth color coordinate on the 1931 CIE chromaticity diagram, with a chromaticity x value of 0.645-0.68 and a chromaticity y value of 0.32-0.335, and when a wavelength of the fourth colored light is between 620 nm and 650 nm, emission intensity of the fourth light emitting element is more than or equal to 80% of maximum emission intensity of the fourth light emitting element;
• and
• a control circuit, based on a target color temperature and the chromaticity x and y values, providing a first emission power ratio signal to the first light emitting element to provide the first colored light, providing a second emission power ratio signal to the second light emitting element to provide the second colored light, providing a third emission power ratio signal to the third light emitting element to provide the third colored light, and providing a fourth emission power ratio signal to the fourth light emitting element to provide the fourth colored light, wherein the target color temperature ranges between 1000K and 12000K.