LED light source for full-spectrum plant illumination and lamp thereof

Abstract

The invention discloses an LED light source and lamp for full-spectrum plant illumination, and the LED light source comprises a support which is fixedly provided with a plurality of purple light chips, and the purple light chips are electrically connected; the peak wavelength of the purple light chip is 365 to 385 nm; the coating layer is formed by mixing a fluorescent powder group and silica gel according to a certain proportion and then coating the mixture on the surface of each purple light chip; the fluorescent powder group comprises blue fluorescent powder of which the peak wavelength is 440-460 nm; the fluorescent powder comprises green fluorescent powder with the particle size of 520-540 nm, red fluorescent powder with the particle size of 620-660 nm and near-infrared fluorescent powder with the particle size of 710-730 nm. The weight ratio of the blue fluorescent powder to the green fluorescent powder to the red fluorescent powder to the infrared fluorescent powder is 1: (0.1-0.2): (0.5-2): (0.2-0.4).

Description

Technical Field

[0001] The present invention belongs to the technical field of lighting, and particularly relates to an LED light source and a lamp for full-spectrum plant lighting. Background Art

[0002] The light environment is one of the important physical environmental factors for plant growth and development. The effects of light on plants are mainly reflected in two aspects: on the one hand, light provides the necessary radiant energy for plant photosynthesis, which is the basis for plants to obtain energy and grow; on the other hand, light acts as a signaling molecule to regulate many physiological processes in the entire life cycle of plants, including growth, flowering, fruiting, etc. During the growth process of plants, appropriate spectral components are crucial for promoting photosynthesis and improving growth efficiency. To meet the diverse light requirements of plants at different growth stages, a comprehensive LED plant lighting solution often needs to integrate blue light, red light, and appropriate amounts of yellow-green light and infrared light. Blue light is beneficial for plants to form anthocyanins and inhibit the growth of branches and leaves; red light promotes the overall growth of plants, especially during the flowering and fruiting periods, increasing the growth rate, the number of fruits, and reducing the incidence of deformed fruits. Near-infrared light around 730nm has a positive promoting effect on plant growth, such as regulating the plant growth cycle, promoting seed germination, and controlling seedling morphology.

[0003] Currently, the light source of commonly used LED plant growth lights in the market is LED SMD lamp beads, which are widely composed of a white LED light source obtained by exciting phosphor with a 450nm blue light chip, an LED light source directly emitting red light with a 660nm red light chip, and an LED light source directly emitting near-infrared light with a 730nm chip. However, it has technical problems such as low luminous efficiency, inconsistent reliability, and poor light supplement uniformity; and the main technical problems in achieving full-spectrum plant lighting by using the method of chip-excited phosphor are relatively low overall photosynthetic photon efficiency and lack of violet, red, and far-red light spectra. Summary of the Invention

[0004] To solve the above technical problems, the present invention proposes an LED light source for full-spectrum plant lighting to solve the technical problems such as low luminous efficiency, inconsistent reliability, and poor light supplement uniformity caused by the existing LED lamp beads piecing together and chip-excited phosphor for achieving full-spectrum plant lighting.

[0005] To achieve the above technical problems, the present invention adopts the following technical solutions:

[0006] An LED light source for full-spectrum plant lighting, comprising: a bracket on which a plurality of violet chips are fixed and the violet chips are powered; the peak wavelength of the violet chips is 365m - 385nm; a coating layer which is coated on the surfaces of the violet chips after being mixed by a phosphor group and silica gel in a certain proportion; the phosphor group includes a blue phosphor with a peak wavelength of 440nm - 460nm; a green phosphor of 520 - 540nm, a red phosphor of 620 - 660nm and a near-infrared phosphor of 710nm - 730nm; and the weight ratio of the blue phosphor, the green phosphor, the red phosphor and the infrared phosphor is 1:(0.1 - 0.2):(0.5 - 2):(0.2 - 0.4).

[0007] Preferably, the blue phosphor is any one or two of BaMgAl10O17:Eu2+ and Sr5(PO4)3Cl:Eu2+.

[0008] Preferably, the blue phosphor is a mixture of BaMgAl10O17:Eu2+ and Sr5(PO4)3Cl:Eu2+, and the molar ratio range is 1:(1 - 2).

[0009] Preferably, the green phosphor is any one or two of Y3(Al,Ga)5O12:Ce3+ and Lu3(Al,Ga)5O12:Ce3+.

[0010] Preferably, the red phosphor is any two of (Sr,Ca)AlSiN3:Eu2+, K2SiF6:Mn4, K2GeF6Mn4+, K2(Si,Ge)F6:Mn4+ and 3.5MgO·0.5MgF2·GeO2:Mn4+, and 3.5MgO·0.5MgF2·GeO2:Mn4+ phosphor must be included.

[0011] Preferably, the red phosphor is a combination of K2(Si,Ge)F6:Mn4+ and 3.5MgO·0.5MgF2·GeO2:Mn4+, and the weight ratio of K2(Si,Ge)F6:Mn4+ and 3.5MgO·0.5MgF2·GeO2:Mn4+ is 1:(2 - 3).

[0012] Preferably, in the red phosphor K2(Si,Ge)F6:Mn4+, the molar ratio of Si and Ge is 1:(0.05 - 0.1).

[0013] Preferably, the infrared phosphor is any one of Y3(Al,Ga)5O12:Cr3+ and Ga2O3:Cr3+.

[0014] The present invention also provides a plant lighting fixture, which includes the above-mentioned LED light source.

[0015] Due to the above technical solution, the present invention uses a combination of broadband and narrowband phosphors, reducing the mutual absorption between phosphors, greatly improving the excitation efficiency of red light at 630 nm and 660 nm, and solving the technical problem of low spectral excitation efficiency of existing phosphor-converted plant lights; on the other hand, according to the difference in the excitation wavelengths of phosphors, the spectral composition of violet, green, red, far-red light, etc. of the light source can be controlled by controlling the component ratio of phosphors, meeting the spectral requirements for plant growth at different stages, solving the problems of low luminous efficiency, inconsistent reliability, and poor light supplement uniformity brought by existing LED SMD lamp beads, and greatly reducing the cost of the light source and the lighting fixture. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 Schematic structural diagram of the technical solution of the present invention.

[0017] Figure 2 Spectral schematic diagram of the 12 LED light sources in the embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] The following will further specifically illustrate the technical solution of the present invention through embodiments and in conjunction with the drawings.

[0019] The full-spectrum plant lighting LED light source of the present invention includes a bracket 1, a violet chip 2, and a coating layer 3. The violet chip 2 is fixed in the surface groove of the bracket 1, and each violet chip 2 is powered on. The peak wavelength of the violet chip 2 is 365 m - 385 nm. The coating layer 3 is formed by mixing a phosphor group and silica gel in a certain ratio and coating it on the surface of each said violet chip 2.

[0020] Among them, the phosphor group includes a blue phosphor with a peak wavelength of 440 nm - 460 nm; a green phosphor with a peak wavelength of 520 - 540 nm, a red phosphor with a peak wavelength of 620 - 660 nm, and a near-infrared phosphor with a peak wavelength of 710 nm - 730 nm; and the weight ratio of the blue phosphor, green phosphor, red phosphor, and infrared phosphor is 1:(0.1 - 0.2):(0.5 - 2):(0.2 - 0.4).

[0021] The blue phosphor is selected from any one or two of BaMgAl10O17:Eu2+ and Sr5(PO4)3Cl:Eu2+; the green phosphor is any one or two of Y3(Al,Ga)5O12:Ce3+ and Lu3(Al,Ga)5O12:Ce3+; the red phosphor is any two of (Sr,Ca)AlSiN3:Eu2+, K2SiF6:Mn4, K2GeF6Mn4+, K2(Si,Ge)F6:Mn4+ and 3.5MgO·0.5MgF2·GeO2:Mn4+, and the phosphor 3.5MgO·0.5MgF2·GeO2:Mn4+ must be included; the infrared phosphor is any one of Y3(Al,Ga)5O12:Cr3+ and Ga2O3:Cr3+.

[0022] The phosphor schemes excited by the ultraviolet chips adopted in the present invention all have relatively high fluorescence conversion efficiency. In particular, the red light and far red light adopted have narrow-band emission characteristics, and the wavelengths of the red light and infrared light are both between 650 - 660 nm and 720 - 740 nm, which are suitable for plant growth. The blue phosphor adopted is a mixture of BaMgAl10O17:Eu2+ and Sr5(PO4)3Cl:Eu2+. By optimizing the ratio of the two, on the one hand, the blue light wavelength is satisfied, and on the other hand, the excitation wavelength is matched and the energy loss is reduced, which greatly improves the excitation efficiency of the blue phosphor.

[0023] Based on the optimization of the ratios of the blue, green, red, and far red phosphors, on the one hand, the spectrum required for plant growth is satisfied, and on the other hand, the mutual absorption between the phosphors is greatly reduced, improving the luminous efficiency of the overall light source. Conventional plant light spectra that meet the above wavelengths are usually composed of a combination of multiple light sources, and the light supplement uniformity is poor; the present invention uses one light source to achieve a great improvement in both the uniformity and reliability of the above spectrum.

[0024] The following are the comparisons of the various embodiments of the present invention:

[0025] Example 1:

[0026] The blue phosphor is selected as BaMgAl10O17:Eu2+;

[0027] The green phosphor is selected as Y3(Al,Ga)5O12:Ce3+;

[0028] The red phosphor is (Sr,Ca)AlSiN3:Eu2+ and 3.5MgO·0.5MgF2·GeO2:Mn4+;

[0029] The infrared phosphor is (Y3(Al,Ga)5O12:Cr3+;

[0030] The weight ratio of blue phosphor : green phosphor : red phosphor : infrared phosphor is 1:0.1:0.5:0.2.

[0031] Example 2:

[0032] The blue phosphor used is Sr5(PO4)3Cl:Eu2+;

[0033] The green phosphor used is Y3(Al,Ga)5O12:Ce3+;

[0034] The red phosphor is (Sr,Ca)AlSiN3:Eu2+ and 3.5MgO·0.5MgF2·GeO2:Mn4+;

[0035] The infrared phosphor is (Y3(Al,Ga)5O12:Cr3+;

[0036] The weight ratio of blue phosphor : green phosphor : red phosphor : infrared phosphor is 1:0.1:0.5:0.2.

[0037] Example 3:

[0038] The blue phosphor used is a mixture of BaMgAl10O17:Eu2+ and Sr5(PO4)3Cl:Eu2+ with a molar ratio of 1:1;

[0039] The green phosphor used is Y3(Al,Ga)5O12:Ce3+;

[0040] The red phosphor is (Sr,Ca)AlSiN3:Eu2+ and 3.5MgO·0.5MgF2·GeO2:Mn4+;

[0041] The infrared phosphor is (Y3(Al,Ga)5O12:Cr3+;

[0042] The weight ratio of blue phosphor : green phosphor : red phosphor : infrared phosphor is 1:0.1:0.5:0.2.

[0043] Example 4:

[0044] The blue phosphor used is a mixture of BaMgAl10O17:Eu2+ and Sr5(PO4)3Cl:Eu2+ with a molar ratio of 1:1. The green phosphor used is a mixture of Y3(Al,Ga)5O12:Ce3+ and Ce3+, Lu3(Al,Ga)5O12:Ce3+;

[0045] The red phosphor is (Sr,Ca)AlSiN3:Eu2+ and 3.5MgO·0.5MgF2·GeO2:Mn4+;

[0046] The infrared phosphor is (Y3(Al, Ga)5O12:Cr3+;

[0047] The weight ratio of the blue phosphor: green phosphor: red phosphor: infrared phosphor is 1:0.1:0.5:0.2.

[0048] Example 5:

[0049] The blue phosphor selected is a mixture of BaMgAl10O17:Eu2+ and Sr5(PO4)3Cl:Eu2+ with a molar ratio of 1:1. The green phosphor selected is Y3(Al, Ga)5O12:Ce3+;

[0050] The red phosphor is K2GeF6Mn4+ and 3.5MgO·0.5MgF2·GeO2:Mn4+;

[0051] The infrared phosphor is (Y3(Al, Ga)5O12:Cr3+;

[0052] The weight ratio of the blue phosphor: green phosphor: red phosphor: infrared phosphor is 1:0.1:0.5:0.2.

[0053] Example 6:

[0054] The blue phosphor selected is a mixture of BaMgAl10O17:Eu2+ and Sr5(PO4)3Cl:Eu2+ with a molar ratio of 1:1. The green phosphor selected is Y3(Al, Ga)5O12:Ce3+;

[0055] The red phosphor is K2(Si,Ge)F6:Mn4+ and 3.5MgO·0.5MgF2·GeO2:Mn4+; where the molar ratio of Si and Ge is 1:0.05;

[0056] The infrared phosphor is (Y3(Al, Ga)5O12:Cr3+;

[0057] The weight ratio of the blue phosphor: green phosphor: red phosphor: infrared phosphor is 1:0.1:0.5:0.2.

[0058] Example 7:

[0059] The blue phosphor selected is a mixture of BaMgAl10O17:Eu2+ and Sr5(PO4)3Cl:Eu2+ with a molar ratio of 1:1;

[0060] The green phosphor selected is Y3(Al, Ga)5O12:Ce3+;

[0061] The red phosphor is (Sr, Ca)AlSiN3:Eu2+ and 3.5MgO·0.5MgF2·GeO2:Mn4+;

[0062] The infrared phosphor is Ga2O3:Cr3+;

[0063] The weight ratio of the blue phosphor: green phosphor: red phosphor: infrared phosphor is 1:0.1:0.5:0.2.

[0064] Example 8:

[0065] The blue phosphor selected is a mixture of BaMgAl10O17:Eu2+ and Sr5(PO4)3Cl:Eu2+ with a molar ratio of 1:1;

[0066] The green phosphor selected is Y3(Al, Ga)5O12:Ce3+;

[0067] The red phosphor is (Sr, Ca)AlSiN3:Eu2+ and 3.5MgO·0.5MgF2·GeO2:Mn4+;

[0068] The infrared phosphor is (Y3(Al, Ga)5O12:Cr3+;

[0069] The weight ratio of the blue phosphor: green phosphor: red phosphor: infrared phosphor is 1:0.2:2:0.4.

[0070] Example 9:

[0071] The blue phosphor selected is a mixture of BaMgAl10O17:Eu2+ and Sr5(PO4)3Cl:Eu2+ with a molar ratio of 1:1;

[0072] The green phosphor selected is Y3(Al, Ga)5O12:Ce3+;

[0073] The red phosphor is (Sr, Ca)AlSiN3:Eu2+ and 3.5MgO·0.5MgF2·GeO2:Mn4+;

[0074] The infrared phosphor is (Y3(Al, Ga)5O12:Cr3+;

[0075] The weight ratio of the blue phosphor: green phosphor: red phosphor: infrared phosphor is 1:0.15:1.5:0.3.

[0076] Example 10:

[0077] The blue phosphor selected is a mixture of BaMgAl10O17:Eu2+ and Sr5(PO4)3Cl:Eu2+ with a molar ratio of 1:1;

[0078] The green phosphor is Y3(Al,Ga)5O12:Ce3+;

[0079] The red phosphor is K2GeF6Mn4+ and 3.5MgO·0.5MgF2·GeO2:Mn4+, where the weight ratio of K2(Si,Ge)F6:Mn4+ and 3.5MgO·0.5MgF2·GeO2:Mn4+ is 1:2; where the molar ratio of Si and Ge is 1:0.08;

[0080] The infrared phosphor is (Y3(Al,Ga)5O12:Cr3+;

[0081] The weight ratio of blue phosphor:green phosphor:red phosphor:infrared phosphor is 1:0.1:0.5:0.2.

[0082] Example 11:

[0083] The blue phosphor is a mixture of BaMgAl10O17:Eu2+ and Sr5(PO4)3Cl:Eu2+ with a molar ratio of 1:1;

[0084] The green phosphor is Y3(Al,Ga)5O12:Ce3+;

[0085] The red phosphor is K2GeF6Mn4+ and 3.5MgO·0.5MgF2·GeO2:Mn4+, where the weight ratio of K2(Si,Ge)F6:Mn4+ and 3.5MgO·0.5MgF2·GeO2:Mn4+ is 1:3; where the molar ratio of Si and Ge is 1:0.08;

[0086] The infrared phosphor is (Y3(Al,Ga)5O12:Cr3+;

[0087] The weight ratio of blue phosphor:green phosphor:red phosphor:infrared phosphor is 1:0.1:0.5:0.2.

[0088] Example 12:

[0089] The blue phosphor is a mixture of BaMgAl10O17:Eu2+ and Sr5(PO4)3Cl:Eu2+ with a molar ratio of 1:2;

[0090] The green phosphor is Y3(Al,Ga)5O12:Ce3+;

[0091] The red phosphor is K2(Si, Ge)F6Mn4+ and 3.5MgO·0.5MgF2·GeO2:Mn4+, where the weight ratio of K2(Si,Ge)F6:Mn4+ to 3.5MgO·0.5MgF2·GeO2:Mn4+ is 1:3; and the molar ratio of Si to Ge is 1:0.05;

[0092] The infrared phosphor is (Y3(Al, Ga)5O12:Cr3+;

[0093] The weight ratio of the blue phosphor: green phosphor: red phosphor: infrared phosphor is 1:0.1:0.5:0.2.

[0094] Example 13:

[0095] The blue phosphor selected is a mixture of BaMgAl10O17:Eu2+ and Sr5(PO4)3Cl:Eu2+, with a molar ratio of 1:2;

[0096] The green phosphor selected is Y3(Al, Ga)5O12:Ce3+;

[0097] The red phosphor is K2SiF6Mn4+ and 3.5MgO·0.5MgF2·GeO2:Mn4+, where the weight ratio of K2SiF6:Mn4+ to 3.5MgO·0.5MgF2·GeO2:Mn4+ is 1:3; and the molar ratio of Si to Ge is 1:0.1;

[0098] The infrared phosphor is (Y3(Al, Ga)5O12:Cr3+;

[0099] The weight ratio of the blue phosphor: green phosphor: red phosphor: infrared phosphor is 1:0.1:0.5:0.2.

[0100] Comparative Example 1:

[0101] The blue phosphor selected is a mixture of BaMgAl10O17:Eu2+ and Sr5(PO4)3Cl:Eu2+, with a molar ratio of 1:2;

[0102] The green phosphor selected is Y3(Al, Ga)5O12:Ce3+;

[0103] The red phosphor is K2(Si, Ge)F6Mn4+ and 3.5MgO·0.5MgF2·GeO2:Mn4+, where the weight ratio of K2(Si,Ge)F6:Mn4+ to 3.5MgO·0.5MgF2·GeO2:Mn4+ is 1:3; and the molar ratio of Si to Ge is 1:0.04;

[0104] The infrared phosphor is (Y3(Al,Ga)5O12:Cr3+;

[0105] The weight ratio of the blue phosphor: green phosphor: red phosphor: infrared phosphor is 1:0.1:0.5:0.2.

[0106] Comparative Example 2:

[0107] The blue phosphor is a mixture of BaMgAl10O17:Eu2+ and Sr5(PO4)3Cl:Eu2+ with a molar ratio of 1:2;

[0108] The green phosphor is Y3(Al,Ga)5O12:Ce3+;

[0109] The red phosphor is K2(Si,Ge)F6Mn4+ and 3.5MgO·0.5MgF2·GeO2:Mn4+, where the weight ratio of K2(Si,Ge)F6:Mn4+ and 3.5MgO·0.5MgF2·GeO2:Mn4+ is 1:3; where the molar ratio of Si and Ge is 1:0.11;

[0110] The infrared phosphor is (Y3(Al,Ga)5O12:Cr3+;

[0111] The weight ratio of the blue phosphor: green phosphor: red phosphor: infrared phosphor is 1:0.1:0.5:0.2.

[0112] Comparative Example 3:

[0113] The blue phosphor is a mixture of BaMgAl10O17:Eu2+ and Sr5(PO4)3Cl:Eu2+ with a molar ratio of 1:2.2;

[0114] The green phosphor is Y3(Al,Ga)5O12:Ce3+;

[0115] The red phosphor is K2(Si,Ge)F6Mn4+ and 3.5MgO·0.5MgF2·GeO2:Mn4+, where the weight ratio of K2(Si,Ge)F6:Mn4+ and 3.5MgO·0.5MgF2·GeO2:Mn4+ is 1:3; where the molar ratio of Si and Ge is 1:0.05;

[0116] The infrared phosphor is (Y3(Al,Ga)5O12:Cr3+;

[0117] The weight ratio of the blue phosphor: green phosphor: red phosphor: infrared phosphor is 1:0.1:0.5:0.2.

[0118] Comparative Example 4:

[0119] The blue phosphor is a mixture of BaMgAl10O17:Eu2+ and Sr5(PO4)3Cl:Eu2+, with a molar ratio of 1:0.9;

[0120] The green phosphor is Y3(Al,Ga)5O12:Ce3+;

[0121] The red phosphor is K2(Si,Ge)F6Mn4+ and 3.5MgO·0.5MgF2·GeO2:Mn4+, where the weight ratio of K2(Si,Ge)F6:Mn4+ to 3.5MgO·0.5MgF2·GeO2:Mn4+ is 1:3; and the molar ratio of Si to Ge is 1:0.05;

[0122] The infrared phosphor is (Y3(Al,Ga)5O12:Cr3+;

[0123] The weight ratio of the blue phosphor: green phosphor: red phosphor: infrared phosphor is 1:0.1:0.5:0.2.

[0124] Comparative Example 5:

[0125] A light source for plant lighting mainly uses a mixture of purple light beads, white light beads, red light beads and infrared light beads, and its spectrum is the same as that of Example 12.

[0126]

[0127]

[0128] Note: The test current for photosynthetic photon efficiency is 60 mA. The light decay at 85°C / 85% RH refers to the light decay of the light source after aging for 1000 hours at a temperature of 85°C and a relative humidity of 85%. The spectral consistency refers to the overall change amplitude of the spectrum after aging for 1000 h. 100% represents that the spectrum has no shift, and vice versa, the smaller the value, the greater the spectral shift. The supplementary light uniformity refers to the spectral consistency of the light source tested at different places within a certain range. 100% represents the best uniformity.

[0129] According to the above experimental results, the combination of the phosphors of the present invention excited by the purple light chip has obvious advantages in uniformity and spectral consistency. By innovatively introducing broadband (green powder and nitride red powder) and narrowband red phosphors (K2(Si, Ge)F6Mn4+ and 3.5MgO·0.5MgF2·GeO2:Mn4+) and optimizing the proportion of the phosphors, the photosynthetic quantum efficiency of the composite spectrum has a significant improvement effect. Among them, after using the combination of K2(Si, Ge)F6Mn4+ and 3.5MgO·0.5MgF2·GeO2:Mn4+, the maximum contribution of the spectrum and fluorescence external quantum efficiency to the photosynthetic quantum efficiency is combined, greatly improving the photosynthetic quantum efficiency of the light source. And the optimal molar ratio of Si and Ge is optimized to be between 1:(0.05-0.1). The blue phosphor is optimized as a mixture of BaMgAl10O17:Eu2+ and Sr5(PO4)3Cl:Eu2+, which contributes the most to the photosynthetic quantum efficiency of the light source. The molar ratio of the two is optimized to 1:(1-2)

[0130] The present invention also provides a plant lighting lamp, which includes the above-mentioned LED light source.

[0131] The above-described embodiments are only used to illustrate the present invention and are not used to limit the scope of the present invention. Equivalent changes and modifications made to the present invention by those skilled in the art should all fall within the scope of the claims attached to the present invention.

Claims

1. An LED light source for full-spectrum plant lighting, characterized in that, Comprising: A bracket, on which a number of ultraviolet chips are fixed, and each of the ultraviolet chips is powered on; The peak wavelength of the ultraviolet chip is 365m - 385nm; A coating layer, which is formed by mixing a phosphor group and silica gel in a certain proportion and then coated on the surface of each ultraviolet chip; the phosphor group includes a blue phosphor with a peak wavelength of 440nm - 460nm; a green phosphor of 520 - 540nm, a red phosphor of 620 - 660nm, and a near-infrared phosphor of 710nm - 730nm; and the weight ratio of the blue phosphor, the green phosphor, the red phosphor, and the infrared phosphor is 1:(0.1 - 0.2):(0.5 - 2):(0.2 - 0.4).

2. The LED light source for full-spectrum plant lighting according to claim 1, characterized in that The blue phosphor is any one or two of BaMgAl10O17:Eu2+ and Sr5(PO4)3Cl:Eu2+.

3. The LED light source for full-spectrum plant lighting according to claim 2, wherein The blue phosphor is a mixture of BaMgAl10O17:Eu2+ and Sr5(PO4)3Cl:Eu2+, and the molar ratio range is 1:(1 - 2).

4. The LED light source for full-spectrum plant lighting according to claim 2, wherein, The green phosphor is Y3(Al, Ga)5O12:Ce3+, Lu3(Al, Ga)5O12:Ce3+ or any one or two of them.

5. The LED light source for full-spectrum plant lighting according to claim 3, wherein The red phosphor is (Sr, Ca)AlSiN3:Eu2+, K2SiF6:Mn4, K2GeF6Mn4+, K2(Si, Ge)F6:Mn4+ and Any two of 3.5MgO·0.5MgF2·GeO2:Mn4+, and 3.5MgO·0.5MgF2·GeO2:Mn4+ phosphor must be included.

6. The LED light source for full-spectrum plant lighting according to claim 5, wherein, The red phosphor is A combination of K2(Si, Ge)F6:Mn4+ and 3.5MgO·0.5MgF2·GeO2:Mn4+, and the weight ratio of K2(Si, Ge)F6:Mn4+ and 3.5MgO·0.5MgF2·GeO2:Mn4+ is 1:(2 - 3).

7. The LED light source for full-spectrum plant lighting according to claim 6, wherein The red phosphor In K2(Si, Ge)F6:Mn4+, the molar ratio of Si and Ge is 1:(0.05 - 0.1).

8. The LED light source for full-spectrum plant lighting according to claim 5 or 7, characterized in that The infrared phosphor is (Y3 (Al, Ga)5O12:Cr3+ and Ga2O3:Cr3+ or any one of them.

9. A plant lighting fixture, characterized in that, The lamp comprises the LED light source according to any one of claims 1 - 8.

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