The effects of different wavelengths of light for photosynthesis in plants are different, the photosynthesis of plants need light, the wavelength is about 400-700nm. 400-500nm (light blue) and 610-720nm (red) are the biggest contribution for photosynthesis.
Blue (470nm) and red (630nm) led, just can provide the desired plant light, therefore, LED street lamps, an ideal choice is to use these two kinds of color combinations. In the visual effect, plant light red and blue combine the pink color.
Blue light can promote the growth of leaves; red light helps to blossom the fruit and prolong the florescence!
LED grow light the proportion of red and blue LED is general 4:1–9:1, usually optional 4-7:1.
Plant lamp for plant growth, leaf height distance is 0.5 meters; every continuous irradiation of 12-16 hours can completely replace the sun.
Semiconductor lighting configurations are most suitable for light source for plant growth.
According to the proportion of settings, Light color can make strawberry, tomato taste sweeter, and more rich nutrition. Irradiation with light Ilex seedlings is the imitation of plants in the outdoor photosynthesis. Through the green plant chloroplast photosynthesis, use the solar energy, carbon dioxide and water into the storage of organic energy, and release oxygen process. The light from the sun is composed of different colors of light; different colors of light growth can produce different effects on plant.
LED light source is also called semiconductor light source, the light source wavelength is narrow, so it can control the color of the light. Separate irradiation on plant use, and improved plant varieties.
Through the experiment to the purple light Ilex seedling, but the blade is very small, the root is also shallow, a pair of malnutrition. Partial yellow light not only small seedlings, leaves seemed lifeless. But Holly growth in red, the blue light is the best, not only strong, but also very well-developed root. The LED street light red lighting and blue light bulb is configured according to the ratio of 9:1.
Results show that, the 9:1 red and blue is most favorable for plant growth, after the light irradiation, strawberry and tomato fruit, sugar and vitamin C content increased significantly, hollow phenomenon will not occur. Continued irradiation for 12 – 16 hours a day, and grow in the light environment, the strawberry, tomato are more delicious than ordinary greenhouse fruit.