A light source module, comprising: a blue light generating portion configured to emit blue light; a red light generating portion configured to emit red light; and a yellow-green light generating portion configured to emit yellow-green light, wherein a peak wavelength of the blue light is within the range of 440 nm -460 nm; a peak wavelength of the red light is within the range of 600 nm -640 nm; a peak wavelength of the yellow-green light is within the range of 515 nm -560 nm; a peak intensity of the red light is 40% to 50% of a peak intensity of the blue light; and irradiation light emitted by the light source module satisfies the following conditions in the CIE1931 chromaticity coordinate system: the horizontal coordinate X is within the range of 0.313-0.343, and the vertical coordinate Y is within the range of 0.312-0.342, characterized in that a peak intensity of the yellow-green light is 40% to 50% of the peak intensity of the blue light; the blue light generating portion comprises a blue LED chip; the red light generating portion comprises a red light phosphor configured to convert part of the blue light emitted by the blue light generating portion into red light; the yellow light generating portion comprises a yellow-green light phosphor configured to convert part of the blue light emitted by the blue light generating portion into yellow-green light, wherein the blue light generating portion, the red light generating portion and the yellow-green light generating portion share one light-emitting unit, wherein the one light-emitting unit is the blue light generating portion. a blue light generating portion configured to emit blue light; a red light generating portion configured to emit red light; and a yellow-green light generating portion configured to emit yellow-green light, wherein a peak wavelength of the blue light is within the range of 440 nm -460 nm; a peak wavelength of the red light is within the range of 600 nm -640 nm; a peak wavelength of the yellow-green light is within the range of 515 nm -560 nm; a peak intensity of the red light is 40% to 50% of a peak intensity of the blue light; and irradiation light emitted by the light source module satisfies the following conditions in the CIE1931 chromaticity coordinate system: the horizontal coordinate X is within the range of 0.313-0.343, and the vertical coordinate Y is within the range of 0.312-0.342, characterized in that a peak intensity of the yellow-green light is 40% to 50% of the peak intensity of the blue light; the blue light generating portion comprises a blue LED chip; the red light generating portion comprises a red light phosphor configured to convert part of the blue light emitted by the blue light generating portion into red light; the yellow light generating portion comprises a yellow-green light phosphor configured to convert part of the blue light emitted by the blue light generating portion into yellow-green light, wherein the blue light generating portion, the red light generating portion and the yellow-green light generating portion share one light-emitting unit, wherein the one light-emitting unit is the blue light generating portion. the horizontal coordinate X is within the range of 0.313-0.343, and the vertical coordinate Y is within the range of 0.312-0.342, characterized in that a peak intensity of the yellow-green light is 40% to 50% of the peak intensity of the blue light; the blue light generating portion comprises a blue LED chip; the red light generating portion comprises a red light phosphor configured to convert part of the blue light emitted by the blue light generating portion into red light; the yellow light generating portion comprises a yellow-green light phosphor configured to convert part of the blue light emitted by the blue light generating portion into yellow-green light, wherein the blue light generating portion, the red light generating portion and the yellow-green light generating portion share one light-emitting unit, wherein the one light-emitting unit is the blue light generating portion.