LED plant lamp, lighting equipment and cultivation method Technical field Multicolor light-emitting diode lamp for plant cultivation, lighting device and plant cultivation method. In addition, the light intensity of the radiation surface suitable for the performance of the lamp is the photon density (dol/smm2) calculated from the number of photons incident on the radiation surface.
LED lamp, lighting equipment and cultivation method Technical field Multicolor light-emitting diode lamp for plant cultivation, lighting device and plant cultivation method.
LED multicolor planting lamp, lighting equipment, and cultivation method TECHNICAL FIELD This invention relates to the multicolor LED lamp for plant cultivation, a lighting device, and a plant cultivation method.
In recent years, there have been studies using artificial light sources to grow plants. In particular, the cultivation methods of LED lamps with good monochromaticity, energy saving, long life, and small size have attracted more and more attention.
As far as we know, it has been confirmed that the wavelength of blue light is 450nm and the wavelength of red light is 600-700nm, which is suitable for plant growth. The wavelength of photosynthesis is between 660-670nm. With strong red light response capability, it is the first choice for nearby light sources.
Magnetic flux is used as the effective light intensity for photosynthesis in plant cultivation. It represents the number of photons per unit area per unit time when light performs effective photosynthesis in the visible light region. In the visible light region, red and blue are effective photosynthetic light.
Calculate the light intensity of the plant cultivation light source based on the optical density (dol/s). In addition, the light intensity of the radiation surface suitable for the performance of the lamp is the photon density (dol/smm2) calculated from the number of photons incident on the radiation surface.
This also shows that the light intensity balance between red and blue is very important for plant growth. Specifically, although the plants are different, most plants have a strong red-blue balance (such as 2-10 times).
The traditional light-emitting LED lamp is a method of illuminating plants with a mixture of red and blue light, and the intensity ratio of blue and red light is equal, a method of designing light distribution performance, and the intensity ratio of LEDs. Light-emitting layer (for example, Patent Documents 1-3).
However, the traditional red LED uses the light-emitting layer AlxGa1-xAs, but since its luminous efficiency is lower than that of the blue LED, it is necessary to improve the luminous efficiency. In addition, when using red LEDs with low luminous efficiency, blue LEDs require a large number of red LEDs to get the best color mixing suitable for plant growth. For this reason, the number of red and blue tubes is different, resulting in a large number of red LEDs scattered around the blue LEDs, and it is difficult to mix uniformly. In addition, in order to make the color mixing uniform, it is necessary to light up all the blue LEDs in the unit.
The other is LED, which is a kind of LED with high luminous efficiency. The light-emitting layer is an aluminum gallium indium phosphide layer (AlXGa1-x) YIn1-YP; 0≤X≤1). ). ,
0 According to the growth of plants, it is important to irradiate blue and red light uniformly under the best balance. In terms of energy saving, it is best to choose not to illuminate a light source that reduces efficiency. Preferably, the amount of red light is greater than the amount of blue light. Therefore, the density of the red light material on the illuminated surface is better than the density of the blue light material. Preferably, the quantum density ratio of red to blue on the radiation receiving surface is uniform.