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Different wavelengths of light for plant photosynthesis, the impact is not, the need for the light of the plant photosynthesis, wavelength in the 400-720nm.

According to the above principle, the plant lamp is made of red and blue combination, all blue and red three forms, in order to provide two red and blue wavelengths of light, covering photosynthesis wavelength range. In the visual effect, the red and blue combination of plant light is pink and white LED lights, the most common is the use of blue core, yellow fluorescent powder, resulting in a combination of white light. Energy distribution, there are two peaks in the blue area of 445nm and the yellow green area of 550nm. And the plants need 610-720nm red light, is very short. This explains why in the white LED irradiation, plant growth, 

LED plant growth lights of the red and blue lamp configuration ratio, in general, flowers, or leaf vegetables, select the 4-6:1, so that a little blue light, because the blue light is conducive to the growth of plant leaves. The flower at anthesis. 7-9:1 fill, let the red light more, because of the red light to plants blossom and result. From seedling to blossom in the whole growth period to fill, 6-7:1 on the line. Remember to see, in the purple light of the holly seedlings, long, but the leaves are very small, the root is also shallow, a poor nutrition. Under the yellow light of the seedling is not only short, the leaves look no life. And in the red, blue, the growth of the growth of the holly is the best, not only strong, but also very well-developed root system. According to the introduction, this light source of red light bulbs and blue light bulbs are in accordance with the proportion of 9:1 configuration.

In addition to Holly seedlings, the experts also conducted experiments with light, Wen Xinlan, strawberry, tomato. The results show that the red blue light of 9:1 is the most favorable for plant growth. Red LED, 430nm blue LED, and red LED and blue LED were used to form the same size of the seedlings. After 3 weeks, the growth of seedlings was compared. The results show that the pink light irradiation can promote the growth of plants. The plant growth does not require all wavelengths in the visible light, but only the light absorption of a specific wavelength, the company said. For example, when the plants are in the photosynthesis and flowering, the absorption peak of chlorophyll - 660nm near the red light can promote growth. And the formation of flower, 450nm near the blue light can promote growth. Comparing seedlings of 3 kinds of different color of light irradiation compared with seedlings of red LED irradiation than other two strains seedling growth the slowest, the overall minimum. The leaves of the seedlings irradiated with blue LED were less, and the whole was elongated. And the seedlings with pink LED irradiation, the larger leaves, the overall growth of the plant.