The LED changes the growth cycle of the plant

          Previous plants only grow according to seasonal changes, but now in the LED lighting plants can change the growth cycle, which is why? Study the light From the spectrum began to want to know the LED change plant growth and change the mystery must first know what is the spectrum of LED plant lights.

 

The basis of the study of light is the spectrum, the quality of the application of light requires spectral analysis, LED plant lamp spectrum is particularly important, the manufacturer of plant lamp spectral design ability to determine its market position, LED plant lamp spectrum according to the planting process specifically designed and not To imitate.

 

Plant plant is a cross-border products, plant plant technology is divided into planting equipment technology and planting technology, plant light spectrum technology is planting equipment and planting technology is an important point of connection, it is clear that the decision to plant the spectral design of plant lights The design and manufacture are the guarantee of the best quality of the light quality required by the planting process. These characteristics of the plant lamp determine the complexity and diversity of the plant spectral design.

 

Spectral non - visual applications

 

Spectral applications are for visual and non-visual applications. Lighting is a visual application, and plant lighting is a non-visual application. The physical dimensions of the spectrum are not the same for both visual and non-visual applications, however, many plant lights are now illuminated using lighting units Annotation parameters, this will lead to confusion in the application of parameters may be derived from the "plant lighting" formulation.

 

The spectral study of plant photosynthesis is based on the analysis of the distribution of light radiation power or photons in the wavelength domain, which is achieved by spectral data and spectrograms.

 

 

 

Solar spectrum

 

The solar spectrum of the plant needs to be studied and the solar spectrum measured on the ground belongs to the absorption spectrum. The standard solar spectrum is shown in Figure AM1.5G (G173-03). Due to the different geographical location and season, the measured spectral radiance There are different, but the same shape of the spectrum.

 

 

 

Plant photosynthesis, the usual theory is to study the wavelength of 400nm-700nm range, the wavelength is limited to this range of AM1.5G (below) can be seen that the spectral shape close to the rectangle.

 

 

 

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

 

The solar spectrum has an important reference function for the design of the plant lamp spectrum, but does not have the dependence, trying to imitate the sunlight spectrum to the plant lamp 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%.

 

Analysis of a planting area of ​​the sun is very important for planting in the region, should be in the local instrument through the actual measurement, so that accurate analysis.

 

 

 

The spectrum of red, green and blue light in the wavelength range of 400-700nm is 28.7% for red light, 36.58% for green light and 35.43% for blue light.

 

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

 

Accurate analysis of the local solar spectrum can be planted to the sun and hybrid plant cultivation process to provide scientific reference photosynthetic capacity, can correctly provide the basis for the selection of fill light for sunlight-based plant, the exact spectrum The analysis is more favorable to the SPA2 approach.

 

It should be noted that the spectrum of the solar spectrum is different from that of the artificial light source. The solar spectrum is suitable for the description of the radiation dimension, and the artificial light source is suitable for the description of the photonic quantum dimension. On this question, there are special articles on this topic. look forward to.

 

Spectral and limit parameters of LED light source

 

The LED plant light spectrum as a key discussion, because the LED light source spectrum can be designed according to the planting process requirements, at the same time, LED light source spectrum can be achieved through the dimming spectrum control, LED light source is the only can be realized Variable spectrum of plant light source, plant light variable spectrum technology is mainly for the light form control, energy saving in the role of ordinary plant light through the adjustment of the photoperiod can also be energy-saving, variable spectral application costs will increase a lot.

 

1) The maximum PPF can be estimated based on the spectral shape of the LEDs

 

 

 

The maximum YPF or PPF corresponding to the spectral shape can be calculated after the spectral shape of the plant lamp is determined. This is important for evaluating the application of LED plant lights and is the primary method for comparing the performance of LED plant lights with other types of plant lights, You can refer to our production of the following table:

 

 

 

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

 

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

 

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

 

LED plant lamp spectral design is the planting process requirements of the equipment support ability, relates to the plant lamp manufacturer market competitiveness, is to measure the manufacturers of technology and the main features of the plant lamp spectral design reflects the manufacturer of LED chip With the package of choice, plant lamp spectral analysis and computing power, lighting with light design, light quantum uniformity to control, drive technology, cooling technology, product reliability control, installation of structural design, integrated manufacturing level, marking the manufacturer Of the products in the market's technical strength, the application of the contents of the above aspects to assess the plant lamp products can reduce the investment risk and procurement risk.

 

www.luxledchina.com