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Development history of electric light source for facility gardening lighting

So far, the history of growing plants with electric light sources has been more than 150 years. In fact, the artificial light cultivation of plants is closely related to the development of human lighting technology and human understanding of plant photobiology and the development of electric light source technology, roughly through incandescent lighting and open arc lighting. , Enclosed gaseous discharge and LED solid-state lighting in 4 stages.

Japan was the first to use LED light sources for plant cultivation research. Since then, NASA used LEDs for the lighting of closed life support systems such as space bases. Since the 1980s, developed countries (such as the United States, Japan, the Netherlands, etc.) have begun feasibility studies on LED light sources as light sources for plant growth, focusing on the development of LED light quality for plant tissue culture seedlings, vegetables and food crops. Research on the impact of development and even yield.

In the mid-1990s, NASA began to screen and develop LED light sources for plant cultivation (Goins et al., 1998; Kim et al., 2005), and developed many lighting systems specifically for the space shuttle and the International Space Station. The results of these studies have established the biological basis of plant light quality for the application of LED light sources in various production fields of facility horticulture.

The research and development of agricultural semiconductor lighting technology in China started early and has 20 years of research time. Research institutions represented by the Institute of Agricultural Environment and Sustainable Development of the Chinese Academy of Agricultural Sciences, Nanjing Agricultural University, and the Institute of Semiconductors of the Chinese Academy of Sciences Tissue culture, seedling cultivation, greenhouse light supplementation, livestock and poultry breeding and other fields have made a lot of useful research results in LED light quality biology, LED light source device creation, semiconductor lighting control system, etc., and obtained nearly one hundred independent intellectual property rights Patent, launched a variety of series of lighting products such as light strips, tube lights, panel lights, downlights, inter-row fill lights, bulb lights, etc. Some of the results have reached the international advanced level. The development of the industry has not established the scientific basis.

However, due to the lack of R&D funds and fewer participating units, China’s research on the basis and application of agricultural photobiology is not systematic and in-depth; in addition, due to the low enthusiasm of enterprises and the lack of investment by relevant people, China is The productization of agricultural LED light source devices is extremely lacking, and the research results mostly stay at the stage of experimental sample verification and field trials. It will take time to promote and apply, and more scientific research investment and R&D capital investment are needed to promote the development of agricultural semiconductor lighting industry.

Since 2010, my country's agricultural semiconductor lighting industry has begun to take off, but it lacks the participation of powerful large and medium-sized enterprises, and the country and enterprises have very low R&D costs. Some areas of agricultural production have launched LED light source products, but LED light source products in some production areas are still blank. Compared with international lighting companies such as Philips, my country's agricultural semiconductor lighting has not yet formed product synergy and scale effects. Compared with the international market, the research and development of intelligent control technology and equipment for light environment is even more lagging, which hinders the promotion and application of LED light source devices and products.

Guangdong Weizhaoye Optoelectronics Energy Saving Co., Ltd. started to get involved in the production and research and development of LED plant lighting sources in 2010, "from nothing" to conduct research and experiment on plant lighting spectrum light quality, and actively cooperate with domestic chip production companies to develop and grow together, generation after generation The LED lighting source is updated and upgraded. With years of hard development, it has a mature and complete plant spectrum database, more than 1,000 plant light distribution schemes, and more than 20 kinds of supplementary lighting products suitable for different planting environments. .

Agricultural operators have realized the production benefits of agricultural semiconductor lighting and are highly motivated to apply them. However, they suffer from cost-effective LED lighting equipment and application technology, which has led to a small scale of agricultural semiconductor lighting applications in the country, which needs to be improved. In short, China’s agricultural semiconductor lighting technology equipment and industrial development have a significant gap with the international level. The main reason is that China’s agricultural semiconductor lighting technology research and development, lighting products and its intelligent equipment development, lighting product promotion and application chain have not been opened up, and the combination of production, education and research is insufficient. Inadequate support policies have delayed the advancement of the industry. However, with the maturity and progress of technology in the past few years, and the consequent cost reduction, LED plant supplementary lighting products are more and more accepted by the Chinese people, and have begun to be applied to indoor gardening and agricultural production on a large scale.

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