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Principle of plant growth lamp

May 18, 2017

Light environment is one of the important physical environmental factors which is indispensable to the growth and development of plants. It is an important technology in the field of facility cultivation through the regulation of light quality and the control of plant morphology.

Effects of spectral range on plant physiology:

280nm ~ 315nm on the morphology and physiological processes of minimal impact


315 nm ~ 420nm chlorophyll absorption less, affecting the photoperiod effect, to prevent stem elongation


The highest proportion of chlorophyll and carotenoid uptake at 420 nm ~ 500 nm (blue) had the greatest effect on photosynthesis

500 nm ~ 620nm pigment absorption rate is not high 

620nm ~ 750nm (red) chlorophyll absorption rate "high", the photosynthesis and photoperiod effect has a significant impact

750nm ~ 1000nm low absorption rate, stimulate the cell to extend, affecting flowering and seed germination 

> 1000nm converted into heat

LED plant grow lights .jpg


Wavelengths are rich, just coincides with the spectral range of plant photosynthesis and light form; spectral width is half-width, can be combined as needed to obtain pure monochromatic light and composite spectrum, can focus on a specific wavelength of light balanced irradiation crops; not only can adjust Crop flowering and strong, but also to control plant height and plant nutrients; system less heat, small footprint, can be used for multi-layer cultivation of three-dimensional combination system, to achieve a low heat load and production space miniaturization;

Rizhao is a necessary factor for plant growth in addition to nutrition and water. But every grower knows that daylight is beyond control. Therefore, man-made daylight is more and more recognized in horticulture cultivation, because man-made sunlight can artificially control the season of plant growth and completely shorten the time of plant growth.


Has the following uses: 

1, as a supplement to light, at any time of the day can enhance the light in order to always help plants for photosynthesis. Especially in the winter months, which can extend the effective lighting time.

Whether at dusk or at night, can effectively extend and scientifically control the light required by the plant, free from any environmental changes.

2, in the greenhouse or plant laboratory, can completely replace the natural light, to promote plant growth.


For the vast majority of growers, plant sodium and metal halide lamps are the best light source for alternative sunshine. Metal halide is rich in blue light suitable for the growth of initial plant foliage, agricultural sodium lamp is rich in red and orange light, to promote the flowering results of plants have a positive effect.

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