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Crack the LED to change the plant's growth cycle password

May 20, 2017

Previous plants only grow according to seasonal changes, but now in the LED lights under the plant can change the growth cycle, which is why? Research light to start from the spectrum, would like to know the LED changes in plant growth changes this mystery had to know what LED plant light spectrum is what.

The basis of light research is the spectrum, the application of light quality needs spectral analysis, LED plant lamp spectrum is particularly important, the manufacturer of the plant lamp spectrum design ability to determine its market competition status, LED plant lamp spectrum needs to be designed according to the planting process To imitate.

Plant plants are transboundary products, plant plant technology is divided into planting equipment technology and planting technology, plant light spectrum technology is the planting equipment and planting technology important point of association, need to be clear that the planting process to determine the spectral design of the plant lights Design and manufacture ensure that the light quality required by the planting process achieves optimum efficiency. These characteristics of the plant lamp determine the complexity and diversity of plant spectral design.

Non-visual application of spectroscopy

Spectroscopic applications are visual applications and non-visual applications, lighting is a visual application, plant light is non-visual applications, visual applications and non-visual applications on the spectrum itself is not the same physical dimension, however, still see many plant lights using lighting units Mark the parameters, which will lead to the application of chaotic parameters may be derived from the "plant lighting" of the reference.

The spectral study of plant photosynthesis is based on the wavelength of the optical radiation power or the distribution of light quantum morphology and the amount of (light quality) analysis, this analysis is achieved through the spectral data and spectra.

Solar spectroscopy

Plantation needs to study the solar spectrum, the ground spectrum of the solar spectrum is the absorption spectrum, the standard solar spectrum as shown in Figure AM1.5G (G173-03) as shown by the geographical location and the season is different from the ground to test the amount of spectral radiation There are different, but the spectrum of the same shape.


Plant photosynthesis, the usual theory is to study the wavelength range of 400nm-700nm, the wavelength is limited to this range, we can see that the spectral form close to the rectangle.

In order to provide the artificial design of artificial light source reference, we give the wavelength of 350-850nm range of AM1.5G map for reference.

Solar spectroscopy has an important reference for plant lamp spectral design, but does not have dependency, trying to imitate the solar spectrum to plant lights, is a futile and inefficient approach.


AM1.5G in the 400-700nm wavelength range of red, green, blue radiation ratio: red accounted for 32.62%, green accounted for 35.38%, blue accounted for 32.69%.

This spectrum in the 400-700nm wavelength range of red, green, blue radiation ratio: red light accounted for 28.7%, green accounted for 36.58%, blue accounted for 35.43%.


It can be seen that the geographical location of the different red, green and blue components of the spectrum are different, which the sun type and mixed plant plant design a greater impact.


Accurate analysis of the local solar spectroscopy, solar and hybrid plants can be planted to provide a scientific plant photosynthetic reference, you can correctly provide the basis for the selection of light, for the sun plant plants, accurate spectrum Analysis is more conducive to SPA2 way.

It should be noted that the solar spectrum and artificial light source spectral analysis of the dimension is different, the sun spectrum suitable for the use of radiation scale description, artificial light source suitable for the use of light quantum quantitative description, on this issue, follow-up has a special article, please look forward to.


Spectral and limit parameters of LED light source

The spectrum of the LED plant light as a key discussion, because the LED light source spectrum can be designed according to the planting process requirements, while the LED light source spectrum through the dimming technology can achieve variable spectral control, LED light source is currently only possible Variable spectrum of plant light source, plant lamp variable spectrum technology is mainly for light form control, the role in energy conservation is not, ordinary plant light through the photoperiod adjustment can also be energy-saving, variable spectrum application costs will increase a lot.

The current LED packaging technology mass supply of the highest radiation efficiency of less than 40%:


Light source radiation efficiency = (radiated power / electric power) × 100%


2) The spectral design of the LED plant lamp reflects the manufacturer's quality

The spectral design of the LED plant lamp is the equipment support capability required for the planting process, which relates to the market competitiveness of the plant lamp manufacturer and is a measure of the main characteristics of the manufacturer's technology and process. The spectral design of the plant lamp reflects the manufacturer's LED chip And the choice of packaging, plant light spectrum analysis and computing power, light distribution design, light quantum field uniformity control, drive technology, thermal technology, product reliability control, installation structure design and other comprehensive manufacturing level, marking the manufacturer Of the technical strength of the product in the market, the application of the above aspects of the content to assess the plant lamp products can reduce the investment risk and procurement risk.

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