In accordance with the law of plant growth, the plant growth light must require the principle of solar light (photosynthesis or induced growth), and the light is used to replace the sun light to provide a light source for plant growth and development environment.

    Light environment is one of the important physical environment factors necessary for plant growth and development, through the regulation of light quality and plant morphogenesis and growth and development is a very important technology in facility cultivation areas.

    Effects of different light spectra on the growth of plants

    280 ~ 315nm effect on the morphological and physiological processes is very small

    315 ~ 400nm of chlorophyll absorption less influence of photoperiod effect, increased leaf thickness, inhibition of plant growth

    400 ~ 520nm leaf photosynthesis of spectral bands, on photosynthesis influence biggest: chlorophyll and carotenoid uptake ratio which can prevent yellowing leaf and rosette leaves, promote the growth of plant stems;

    520 ~ 610nm was emitted by plants, the absorption rate of pigment is not high

    610 ~ 720nm, another important spectral band, has a significant effect on Photosynthesis and light cycle effect, high chlorophyll absorption rate, the formation of flowers and leaves, and the development of the rhizome has a great effect. Especially, it is particularly important for seed germination, branching of branches and leaves, pigment synthesis, stem growth, flowering and enzyme formation;

    720 ~ 1000nm absorption rate is low, stimulate cell elongation, inhibit flowering and seed germination, increase the dry matter weight of plants.

    >1000nm infrared light crop after absorption into heat no other role.