How Does Different Light Quality Influence Plants

Light may affect various aspects during the growth and development of the plants, such as seed germination, geotropism, phototropism and gene expression. More importantly, as a kind of energy and signal factor, light helps plants convert carbon dioxide and water into organic matter through photosynthesis to provide necessary materials and energy for their own growth. The chlorophyll, which plays a significant role in plant photosynthesis, absorbs wavelengths mainly in the visible light range (400-720nm wavelength). 

Different colors of visible light have different effects on plants. To understand the effects of different light qualities on plant growth, we must first understand the absorption of different light qualities by plant chlorophyll. The chlorophyll A in the chloroplast absorbs the red and blue-violet light in the visible light, which is grass-green; While the chlorophyll B mainly absorbs blue and yellow-orange light, which is yellow-green, and the green light is rarely absorbed by these two chlorophylls. From the above figure, we could see that the 400~510nm blue-violet light and 610~720nm red orange light have high absorption rate and strong photosynthesis, which is beneficial to plant formation. These kinds of light wavelengths contribute to promoting plant germination and growth. However, the absorption rate and photosynthesis efficiency of green light plants at 510~610nm are low, which inhibits the germination and growth of plants.

According to the influences of different light quality on plants, Sansi takes advantage of the effect of light quality on plants and the growth habits of different plants to develop a series of LED plant supplement lights with various spectrums, powers and installation methods, helping to solve the problems of greenhouses, plants factories, vertical farms, commercial planting homes and other fields in different harsh environments such as rainy days, haze days and low light in winter, so as to promote plant growth, prevent overgrowth, ensure natural color and controllable flowering, and increase production, ultimately helping customers increase economic benefits.