LED agriculture lighting "to shine"

1 The advantages of LED lighting in agricultural applications have become increasingly obvious

LED is a new type of lighting source that has received extensive attention and rapid development in recent years. As a new type of lighting source, LED has many different characteristics from other electric light sources, which also makes it the first choice for energy saving and environmental protection light sources. In the past 10 years, the area of ​​horticultural facilities in China has developed rapidly. The light environment control technology for plant growth has attracted attention. The horticultural light irradiation technology is mainly applied in two aspects: as a supplemental irradiation for photosynthesis of plants when the amount of sunshine is small or when the sunshine time is short; as an induced irradiation of the plant photoperiod and photomorphogenesis. LED has significant advantages in both aspects.

In recent years, with the continuous development of agricultural production technology and people’s increasing demand for improving the planting yield and shortening the planting cycle, artificial light sources are increasingly used in the field of plant growth, such as vegetables, fruits and flowers. Growth lighting, nursery, etc.

LED can also be applied to the aerospace eco-surveillance system. The establishment of a controlled ecological life-support system is the fundamental way to solve the long-term manned space life assurance issue. One of its key technologies is light. Compared with other sources such as cool white fluorescent lamps, high-pressure sodium lamps, and metal halide lamps, LEDs can effectively convert light energy into photosynthetically active radiation; in addition, it has long life, small size, light weight, and solid-state characteristics. Therefore, LEDs have received much attention in recent years for ground and space plant cultivation.

In traditional agricultural production, agricultural technology measures such as using ordinary electric light sources to supplement light and white light sources covering colored plastic films are generally used to change the light environment to regulate the growth and development of plants in the cultivation environment. However, these measures have different degrees of problems, such as the lack of analysis of specific spectral components resulting in impure light quality, inconsistent light intensity, close to or even lower than the light compensation points of plants, and low energy efficiency of irradiation light sources. LED can solve these problems, especially suitable for artificial light control plant cultivation environment.

2 International giants cut into plants with LED lighting to prove market maturity

In addition to general lighting applications, the 2011 Taipei Optoelectronic Expo is the most attention paid to plant lighting. In addition to the establishment of a plant factory by international giant Philips, Osram, a German manufacturer, has also invested in led plant lighting. China's 12th Five-Year Plan has listed plant plants as key projects, and Japan will also establish 100 plant factories after the earthquake. Taiwan factory, which is the second largest producer of LEDs, certainly hopes to take the initiative in this vast market. Simon Technology, Haoran Technology and Haokai Industry have also invested resources and exhibited their proud achievements in this exhibition.

Different bands have different effects on plant growth. To increase the photosynthesis of plants, the proportion of blue light can be increased. To promote seed germination or to regulate flowering can be controlled by red light, and to suppress the growth of plant stems, ultraviolet light can be irradiated. Because LED light is different from sunlight and traditional full spectrum, it belongs to a single spectrum. Therefore, the use of LEDs in the special use of plant lighting has absolute advantages, attracting investment from domestic and foreign manufacturers.

Taking German Osram as an example, the light source designed for LED plant lighting was exhibited for the first time at Taipei Optoelectronics Expo 2011. It was designed with a red light of 656nm wavelength plus 455nm blue light and 6500K white light. Taiwan was the world's LED. As a pioneer in agriculture, Osram exhibited its latest product in plant lighting with Taiwan as its first stop, hoping to grab the Asian LED plant lighting pie.

In addition to displaying the 35W and 70W plant lighting group, Haoran Technology also made the LED plant lighting into the G19 bulb lamp type, hoping to attack the general home market. This product is currently exported to Japan and creates a bright eye. Achievements.

In addition to the LED plant growth lamp module, Simon Technologies and Zhongxing University have long-term cooperative research and established a demonstration farm for Wangwang Agriculture. Repeated experiments were conducted on lettuce and Hami melon. As a result, the weight of lettuce supplemented with LED light was significantly lower than that without light supplement. More than doubled, demonstrating that LED lights have a significant effect on plant growth. Proposed plant factory concept for whole plant output.

Including (1) LED plant light planning and design, (2) light-filled greenhouse planning and construction, (3) three-dimensional combined bed planting, (4) liquid circulatory system, (5) temperature control system, (6 Container plant factories, (7) Integration of energy-saving system applications, and (8) Agricultural technology and materials services. Simon Technology has long been cultivating LED lighting and has made LED plant lighting from a single product to the entire ecosystem concept.

Industrie's industry is displaying a 50W LED plant growth lamp consisting of 32 high-power red light (650~670 nm) plus 4 high-power blue light (450~460 nm). The net weight is about 3 kg up to IP66. Grades can be applied to hydroponic agriculture, horticultural design, greenhouse lighting and homeless cultivation.