As the fourth-generation new lighting source, LED has many characteristics that are different from other electric light sources, which also makes it the first choice for energy-saving and environmentally-friendly light sources. The
LED grow lights used in the field of plant cultivation also exhibit the following characteristics: rich wavelength types, which coincide with the spectral range of plant photosynthesis and light morphology; the half-width of the spectral wave width is narrow, and pure monochromatic light and compound spectra can be obtained by combining as required; It can concentrate light of a specific wavelength to irradiate crops in a balanced manner; it can not only adjust the flowering and fruiting of crops, but also control plant height and plant nutrients; the system has less heat and takes up less space. It can be used in a multi-layer cultivation three-dimensional combination system to achieve Low heat load and miniaturization of production space; in addition, its exceptional durability also reduces operating costs. Because of these remarkable features, LEDs are very suitable for plant cultivation in a controlled facility environment, such as plant tissue culture, facility gardening and factory seedlings, and aerospace ecological life support systems.