Interpretation of Group Standards for Spectral Parameter Specifications of Artificial Radiation Sources of Plants

The Necessity of “Specification of Spectral Parameters of Artificial Radiation Sources of Plants”

1.Fragmentation of plant lamp spectroscopy

The interpretation of plant lamp spectroscopy technology does not pay attention to the theory of plant spectroscopy technology. It is speculated that the spectral properties of plant lamps and the spectral properties of planting processes are blurred. There is no uniform experimental norm and the conclusions are contradictory. The traditional plant spectroscopy technology is limited to the PAR band. There is a lack of evaluation specifications for the UVR band.

Many companies don’t know what kind of measurement system to use to label plant lights. Many companies use the photometric parameters of illumination, such as luminous flux, illuminance value, color temperature, color rendering index, etc. Fragmentation performance.

2.The application of plant lamp concept is fuzzy

It can be seen from relevant research papers at home and abroad that there are no uniform definitions and annotations for the technical parameters of plant lamps, and many parameters indicate the existence of errors in the dimensional units, which seriously affect the technical development.
If the PPF is confused with the PPFD unit, the UV-A band and the Fr band are marked with PPF. Some companies know that they cannot be marked with PPF, but there is no suitable labeling method. The label values of these two bands cannot reflect the actual parameters.

For the plant light wavelength range of 380-750nm, the company uses PPF and PPFD labeling. The labels of these enterprises are all derived from the measurement value of the photonometer, which invisibly reduces the parameter of the plant lamp.

Parameter labeling errors have also appeared in some professional papers.

3.The imaginary standard of plant lamp parameters in the industry is serious

The phenomenon of virtual standard parameters in the industry is serious. This kind of virtual standard comes from two aspects. One is that it does not know how to mark, and the other is deliberately to the virtual standard parameters. The main manifestation is the virtual standard QE value of light quantum efficiency and the increase of plant lamp power value. In particular, the virtual high power value is outstanding in the online shopping platform, which seriously affects the judgment and use effect of the user.

Those virtual standard powers are worthy of plant lights, the actual power is only less than half of the marked value, and the imaginary power value of plant lights is still spreading.

However, the virtual standard power value causes the light quantum efficiency of the luminaire to be low to the point where it is not available. At present, foreign countries are required to label the optical quantum efficiency.

Basic points of “Specifications of Spectral Parameters of Artificial Radiation Sources of Plants”

(1)The application of illumination light needs to be explored from photometry and colorimetry, and plant lamp spectroscopy needs to be explored from photometry, radiosity, plant physiology, and planting techniques.

(2)People’s perceptions of lighting and knowledge tend to be used in plant light spectroscopy techniques, such as the reference to “plant lighting.”

(3)The spectral technology and illumination of plant lights are two completely different fields of application, one is human vision application, and the other is plant absorption of light radiation and light form reaction.

(4)The illumination we usually discuss is the perception of light by the human eye, not the plant. The biggest misunderstanding of making plant lights is to use human vision to measure the interaction between light and plants.

Plant lights need to express their performance with different concepts and parameters than lighting. The concept and parameters need to have accurate magnitude, which is what this standard needs to express.

The “Specifications of Spectral Parameters of Plant Artificial Radiation Sources” are mainly reflected in the following aspects:

It is a standard specifically developed for the application of plant lamp spectroscopy.

(2)The system summarizes the terminology and concepts of plant lamp spectral parameters.

(3)Some calculation methods for basic parameters are provided.

(4)A verification method for the measurement parameters is provided.

(5)Expanded the wavelength range to which the spectral parameters apply.

(6)The need for a logo for blue light hazards has been raised.

(7)A complete spectrometric measurement report specification for plant lamps was developed.

(8)It is a technical specification for plant lamps that is highly enforceable.

Application range of “Specifications of Spectral Parameters of Artificial Radiation Sources of Plants”

The scope of application of this standard is an artificial light source suitable for plant growth.

Artificial light sources include: incandescent lamps, fluorescent lamps, HID lamps, electrodeless lamps, and LED lamps.

This standard parameter is also suitable for parameterization of sunlight.

From the perspective of optical quantum efficiency and spectral ratio, LED will have a good development prospect, and the standard formulation is also biased towards LED light source.

For sunlight, this standard provides XD factors and RD factors to convert to photon flux density.

Applicability of the Integrity and Parameters of the Spectral Parameter Specifications for Artificial Radiation Sources of Plants

1) Complete representation of spectral parameters

Photosynthetic Could be measured  Weighted

PPF          MPF          YPF

QE           MQE          YQE

PPFD       MPDF       YPFD

2)Photomorphogenic Responses Radiation (PPR) expresses the response radiation dose established by plant light morphology outside the wavelength range of 400-700 nm.

UVR band identification: PRR (UV-A), PRR (UV-B), PRR (UV-C).

The UVR band uses spectral irradiance to express parameters.

Far red band representation: PPR (Fr-Red), using photon flux density to express parameters.

The standard proposes two important conversion factors

XD(factor):LX to PPFD Conversion Factor

PPFD= Illuminance value (LX)/XD(factor)

(Illuminance unit):lm/m2 (LX)

RD (factor):Irradiance to PPFD Conversion Factor

PPFD= (Irradiance value) E/RD (factor)

radioactivity E (unit):w/m2 。

These two factors are the primary means of verifying the spectral parameters of the plant lamp.

The user of the plant lamp can measure the canopy illuminance value of the plant lamp with a illuminometer, and calculate the corresponding PPFD value by the XD factor to grasp the current light receiving degree of the plant.

The plant lamp user can check whether the spectral parameters of the plant lamp are consistent with the label by XD factor or RD factor.

The Bright Light Source Institute has a complete algorithm to calculate the XD factor of any spectrum. The XD factor and RD factor can be obtained by testing in the plant lamp test sharing laboratory of our institute.

The standard proposes that the plant lamp needs to be marked with a blue light hazard

This standard emphasizes the blue light Hazard (BLH) of plant light. The standard reflects the vision protection of plant lamp users. This standard complies with the light biosafety standard of GB/T20145-2006 lamp and lamp system.

For the blue light hazard, you can refer to the “Blue Light Hazard Mechanism Detailed Explanation” published earlier by this public number. For details, please refer to the following article: The public article has a “Past article” in the lower left corner of the homepage. You can check this article by clicking on the previous article.

The international ophthalmology community pays less attention to blue light hazards than current industry standards. They emphasize that blue light hazard is an age-related macular disease (AMD). AMD is actually a long-term cumulative disease, long-term in high-blue light source and The cumulative incidence of cumulative lesions under sunlight is high. Because this lesion is irreparable and cannot be medically tested in humans, it can only be judged by statistical data. The spectrum of plant lights involves high blue light radiation. This mark is the standard. Tips for human health and safety.

Planting process spectroscopy is the core of plant lamp spectroscopy

The spectroscopic parameter specification of plant artificial radiation source is only the parameter specification of plant lamp, which has nothing to do with planting effect and planting efficiency. It is the attribute of lamp and it is the ability to express the plant lamp itself by parameterization.

The design and application of plant lamps need to be carried out according to the customer’s requirements for the spectral parameters of the planting process. Different planting techniques of the same plant have different requirements for plant lamps.

The spectral parameters of the planting process are required to include a series of process parameters including spectral morphology, radiation dosage, plant uptake, environmental parameters, plant germplasm and planting substrate.

The technical parameters of plant lamp spectroscopy are the technical core of plant lamps.

“Specifications of Spectral Parameters of Plant Artificial Radiation Sources” is an important standard in the design and application of plant lights. After the publication of this standard, it has caused great repercussions in the industry. It is generally considered to be a highly enforceable standard. The standard has a very strong technical specialty. Sexual and scientific, this group standard is instructive for the future development of the company. It is hoped that the enterprise can use this standard to meet the technical requirements of the company’s own technological development.

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