Light emitting device and light apparatus for plant growth

A light emitting device for plant growth, comprising:

• a blue light emitting diode configured to emit blue light having a dominant wavelength in a range of 430 nm to 470 nm;
• a first wavelength converting material configured to be excited by the blue light and emit first light having a peak wavelength of 530 nm to 560 nm;
• and
• a second wavelength converting material configured to be excited by the blue light and emit second light having a peak wavelength of 610 nm to 650 nm,
• wherein light for plant growth is emitted by mixing the blue light with the first and second light,
• an emission spectrum of the light for plant growth is when a PPF of a 400 nm to 500 nm band is 1, a PPF of a 500 nm to 600 nm band is in a range of 6 to 10, and a PPF of a 600 nm to 700 nm band is in a range of 5 to 7, and
• the light for plant growth has an x coordinate in a range of 0.3531 to 0.4939 and a y coordinate in a range of 0.4150 to 0.5665 in a CIE 1931 color coordinate system.

A light apparatus for plant growth, comprising:

• a circuit board;
• and
• a plurality of light emitting devices on the circuit board,
• wherein the plurality of light emitting devices comprise a blue light emitting diode (LED) configured to emit blue light, and at least one wavelength converting material configured to be excited by the blue light and convert a portion of the blue light into converted light having a different wavelength, the plurality of light emitting devices including a plurality of first light emitting devices configured to emit light for plant growth,
• wherein an emission spectrum of the light for plant growth is when a photosynthetic photon flux (PPF) in a 400 nm to 500 nm band is 1, a PPF in a 500 nm to 600 nm is in a range of 6 to 10, and a PPF in a 600 nm to 700 nm band is in a range of 5 to 7.