The development of LED plant lighting standards, and discuss the framework of the LED plant lighting standard system. The National Semiconductor Lighting Engineering R&D and Industry Alliance (CSA) started the standardization of LED plant lighting in 2012, and released the first group standard T/CSA021-2013 "Performance Requirements for LED Plant Light Panel Lights" in 2013; later, it promoted the formulation National standard GB/T32655 "Terms and definitions of LED plant lighting", group standard T/CSA 032-2016 "General technical specifications for LED lamps for plant lighting", etc.
Traditional light sources such as incandescent lamps, fluorescent lamps, high-pressure sodium lamps, and high-pressure mercury lamps are used in agriculture and biological fields. They have the disadvantages of low biological light efficiency, high energy consumption and high operating costs. Taking artificial light plant factories as an example, the energy consumption of light sources is about It accounts for 40%~60% of system operating cost. Compared with traditional lighting, LED light source can form a spectral absorption peak that is basically consistent with plant photosynthesis and its morphology. It has the advantages of high efficiency, low energy consumption, no mercury pollution, precise wavelength, intelligent controllable system, etc., and the system can save up to 50% % Above, it has broad application prospects in many fields such as greenhouse light supplementation, plant tissue culture, plant factories, and genetic breeding.
There are many forms of LED plant light lighting products, such as flat panel lights, double-ended lights, flexible light strips, etc., and will gradually change with the development of technology. Around 2013, LED panel lights were mainly used in the cultivation of seedlings. The standard specifies the terms and definitions, classification and naming, technical requirements, test methods, inspection rules, signs, packaging, transportation and storage of LED plant light panel lights. The standard content shows the basic measurement index of LED plant light source, which is quite different from the parameters of living lighting.
The standard defines the main radiation wavelength of the LED plant light flat panel lamp, which refers to the red-orange radiation wavelength range of 600~700nm and the blue-violet radiation band of 400~500nm, based on which the blue-violet radiation illuminance is defined , Red-orange irradiance, which defines the red-blue irradiance ratio; the standard defines the total radiant flux (unit: W) and total irradiance (unit: W/m²) based on physical quantities to support the growth of plants in the LED lighting field Production, testing, acceptance and other work. The standard defines the photosynthetic photon flux density [unit: μmol/(m²·s)], which refers to the number of photons within a certain wavelength range emitted by the lamp received per unit area of time during photosynthesis. The number of photons received during photosynthesis is not easy to measure, and its technical requirements are not reflected in the standard.
This standard focuses on the general technical performance and evaluation indicators of LED lighting products. Due to the wide variety of lighting products used in the plant lighting industry, the specifications and models are different, and the performance and quality are uneven, it is urgent to establish a relatively uniform judgment and evaluation standard for performance indicators. Since this industry is an emerging industry, the early introduction of relevant standards is convenient to guide the development of industrial technology and product positioning, but because the evaluation of some technical performance is not mature enough, some parameters (such as photon flux efficiency, light source spectral distribution and plant spectrum coincide. The requirements of degree grading need to be further improved.
The standard puts forward the GB7000 basic safety requirements that LED plant light panel lights should meet, the control device meets the requirements of GB19510.14, GB/T 24825, and electromagnetic compatibility performance requirements; in terms of electrical characteristics, power and power factor requirements are specified; in terms of radiation In terms of performance, the initial radiant flux/radiation efficiency, radiant intensity distribution, radiant illuminance and red-blue radiant illuminance ratio, and uniformity of radiant illuminance are specified; requirements are also made in terms of radiation spectrum characteristics and lifetime characteristics.
According to the requirements of the application environment, the standard supplements the terms C3 plants, C4 plants, CAM plants and other terms classified according to the plant photosynthetic cycle pattern. LED lamps for plant lighting are classified according to lamp usage, plant photosynthesis mode, and control mode. The safety performance, structural appearance, electrical performance (power, power factor), optical performance, reliability, electromagnetic compatibility, etc. of LED plant light lamps are standardized, and the photon flux efficiency of the lamps is classified, and the technical requirements are given. Out of the detection method.
In the structural appearance requirements, requirements are put forward for the anti-corrosion (up to WF2) and anti-ultraviolet aging of the lamp surface; in the optical performance requirements, the photon flux and photon flux efficiency are specified. [The measured value should not be less than 0.7μmol/ (s·W)], spectral distribution, light distribution curve and other parameter requirements; the reliability part mainly focuses on the maintenance of photon flux and environmental adaptability; in the energy efficiency classification of lamps, the first corresponding high-pressure sodium lamp [1.9μmol/ (s·W)] and fluorescent lamp [1.3μmol/(s·W)] photon flux efficiency key points, the photon flux efficiency of LED light source is divided into three categories: One type [ηP ≥ 1.9μmol/(s· W)], Type II [1.3μmol/(s·W) ≤ηP<1.9μmol/(s·W)] and Type III [(0.7μmol/(s·W) ≤ηP<1.3μmol/(s·W) )]. Secondly, according to the degree of coincidence of the light source spectral distribution, the light source can be divided into 3 categories or 3 levels according to different latitudes. The division of energy efficiency grades also considers the photon flux efficiency of the light source and the degree of agreement of the spectral distribution. The above two factors divide energy efficiency into 3 categories, 3 categories, and 9 levels.
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