White light emitting devices

A white light emitting device, comprising:

• a blue light emitting diode configured to emit blue light;
• a first wavelength conversion material configured to be excited by the blue light and emit green light;
• and
• a second wavelength conversion material configured to be excited by the blue light and emit red light,
• wherein the white light emitting device is configured to emit white light based on mixing the blue light, the green light, and the red light, the emitted white light having an emission spectrum including
• a first peak wavelength in a range of 440 nm to 455 nm,
• a second peak wavelength in a range of 530 nm to 540 nm, and
• a third peak wavelength in a range of 640 nm to 650 nm,
• wherein a lowest intensity of the emitted white light between the second peak wavelength and the third peak wavelength, the lowest intensity of the emitted white light being 45% to 55% of a maximum peak intensity of the emitted white light among the first peak wavelength, the second peak wavelength, and the third peak wavelength.

A white light emitting device, comprising:

• a blue light emitting diode configured to emit blue light having a dominant wavelength band of 440 nm to 455 nm;
• a first green phosphor configured to emit first green light based on being excited by the blue light, the first green light having a peak wavelength of 515 nm to 530 nm and a full width at half-maximum (FWHM) equal to or greater than 50 nm or more;
• a second green phosphor configured to emit second green light based on being excited by the blue light, the second green light having a peak wavelength of 535 nm to 555 nm and a full width at half-maximum (FWHM) equal to or less than 70 nm;
• a first red phosphor configured to emit first red light based on being excited by the blue light, the first red light having a peak wavelength of 600 nm to 620 nm and a full width at half-maximum (FWHM) equal to or less than 85 nm;
• and
• a second red phosphor configured to emit second red light based on being excited by the blue light, the second red light having a peak wavelength of 640 nm to 665 nm and a full width at half-maximum (FWHM) equal to or greater than 80 nm,
• wherein the white light emitting device is configured to emit white light based on mixing the blue light, the first green light, the second green light, the first red light, and the second red light,
• wherein a color difference between a reflection spectrum of a white specimen of the emitted white light, and International Commission on Illumination (CIE) Standard illuminant D65, is equal to or less than 106, and
• the white specimen has a white color corresponding to Munsell N9.