1) Rationality of light distribution
The LED plant light chip (hereinafter referred to as the chip) plays a direct role in supplementing light for the plant light. It can be said that all other parts of the LED plant growth light serve the chip. The rationality of the light distribution of the LED plant light is almost entirely Determined by the wafer.
The light distribution includes the chip spectrum and the chip matching. The chip spectrum is the luminous band after the chip is produced. The most important ones are the red light with the wavelength between 610nm and 720nm, and the blue and red light with the wavelength between 400nm and 520nm. Promote plant photosynthesis, mainly affect plant flowering and fruit; blue light enhances plant chloroplast activity, mainly affects rhizome growth. In addition, a small amount of white light, purple light, and green light are used together.
Chip matching refers to the ratio of various waveband chips when the LED plant light is assembled. Strictly speaking, the ratio of the chips used for different growth periods of different plants is different, but considering that it is impossible to change it every few days The workload of batch plant lights is too large and the cost is too high. Therefore, according to whether the plant is planted mainly using its rhizomes or mainly using its flowers and fruits, in general, there are more red light chips than blue light chips, and the plants for harvesting flowers and fruits can be appropriate Increase the ratio of red light chips.
The light distribution rationality of LED plant lights directly affects the formation of plant light. It is also a very important index that must be considered first in the production of LED plant lights, and it is also the most important parameter for judging the performance of LED plant lights.
(2) Uniformity of illumination
Every plant should receive light, and it is best that every plant can receive the same light. Taking a step back, at least the light intensity, light quality, and light duration of each plant should be generally close, otherwise part of it Insufficient light will cause poor growth of plants, resulting in excessive growth. Although the other part grows normally, the LED plant light cannot be fully utilized, which will cause unnecessary waste of resources.
The main reason for the difference in plant growth conditions is the uniformity of illumination. The uniformity of illumination can be divided into the uniformity of the distribution of different light wave band chips in the LED plant growth lamp and the distance distribution between the LED plant lamps.
The chip distribution is generally based on the LED plant light supplement light plant characteristics. After the lamp bead ratio is obtained, how to intersect the chips is calculated, and finally distributed in the plant light according to a certain rule and packaged on the COB panel, making a single unit LED plant lights illuminate the main area with uniform light quality and light intensity distribution.
The arrangement of the spacing between each LED plant light is mainly determined by the light intensity of the edge of a single LED plant light. In addition, the installation height of the light must be considered. After comprehensive calculation, the distance distribution between each plant light can be obtained to ensure a large area. Uniformity of light during planting.
Therefore, the uniformity of plant lighting is summarized as: uniform light quality and light intensity distribution in the middle and around a single LED plant growth lamp, and uniform light quality and light intensity distribution at the intersection between adjacent lights and other illuminated areas.
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