An LED lighting unit for animal/plant growth, comprising an array of LED chips, wherein a light source color of each of the LED chips is an incandescent or a warm white, of light source colors defined in JISZ9112, light from the LED chips has a first component with a center wavelength of greater than or equal to 610 nm and less than or equal to 630 nm and a full width at half maximum of greater than or equal to 90 nm and less than or equal to 110 nm, a second component with a center wavelength of greater than or equal to 440 nm and less than or equal to 460 nm and a fullwidth at half maximum of greater than or equal to 10 nm and less than or equal to 20 nm, and a third component with a center wavelength of greater than or equal to 510 nm and less than or equal to 530 nm and a full width at half maximum of greater than or equal to 50 nm and less than or equal to 60 nm, a relative emission intensity in the center wavelength of the first component is higher than a relative emission intensity in the center wavelength of the second component, a relative emission intensity in the center wavelength of the third component is lower than the relative emission intensity in the center wavelength of the second component, the relative emission intensity in the center wavelength of the second component is higher than or equal to 0.5 times and lower than or equal to 0.7 times the relative emission intensity in the center wavelength of the first component, and the relative emission intensity in the center wavelength of the third component is higher than or equal to 0.3 times and lower than or equal to 0.5 times the relative emission intensity in the center wavelength of the first component. an array of LED chips, wherein a light source color of each of the LED chips is an incandescent or a warm white, of light source colors defined in JISZ9112, light from the LED chips has a first component with a center wavelength of greater than or equal to 610 nm and less than or equal to 630 nm and a full width at half maximum of greater than or equal to 90 nm and less than or equal to 110 nm, a second component with a center wavelength of greater than or equal to 440 nm and less than or equal to 460 nm and a fullwidth at half maximum of greater than or equal to 10 nm and less than or equal to 20 nm, and a third component with a center wavelength of greater than or equal to 510 nm and less than or equal to 530 nm and a full width at half maximum of greater than or equal to 50 nm and less than or equal to 60 nm, a first component with a center wavelength of greater than or equal to 610 nm and less than or equal to 630 nm and a full width at half maximum of greater than or equal to 90 nm and less than or equal to 110 nm, a second component with a center wavelength of greater than or equal to 440 nm and less than or equal to 460 nm and a fullwidth at half maximum of greater than or equal to 10 nm and less than or equal to 20 nm, and a third component with a center wavelength of greater than or equal to 510 nm and less than or equal to 530 nm and a full width at half maximum of greater than or equal to 50 nm and less than or equal to 60 nm, a relative emission intensity in the center wavelength of the first component is higher than a relative emission intensity in the center wavelength of the second component, a relative emission intensity in the center wavelength of the third component is lower than the relative emission intensity in the center wavelength of the second component, the relative emission intensity in the center wavelength of the second component is higher than or equal to 0.5 times and lower than or equal to 0.7 times the relative emission intensity in the center wavelength of the first component, and the relative emission intensity in the center wavelength of the third component is higher than or equal to 0.3 times and lower than or equal to 0.5 times the relative emission intensity in the center wavelength of the first component.