LED bio-lighting market welcomes great opportunities

With the gradual expansion of LED lighting applications, more and more operators have noticed the business opportunities of LED biological lighting. Take Canada as an example, the annual sales of vegetables and fruits cultivated in greenhouse exceeds 1. 1 billion US dollars. How to provide effective light for greenhouse has become the key to support greenhouse cultivation production and increase revenue. LED replaces the traditional high-pressure sodium lamp to effectively help plants grow. In terms of yield, even under the conditions of moderate temperature, sufficient nutrients and water, greenhouse cultivation will still be affected by limited light. University of McGill, Canada ( McGillUniversity) Researchers believe that the current greenhouse cultivation commonly used to supplement the light, such as the traditional high-pressure sodium lamp, is not an effective light source for plant growth, and therefore actively seek other alternative lighting. Researchers pointed out that the wavelength of light required for plant photosynthesis is about 400nm to 700nm, especially in the blue and red light regions, which is close to the efficiency curve of plant photosynthesis. They believe that growers can use LED plant lamps to combine light of specific wavelengths as needed to convert light into photosynthetic active radiation. It can not only improve plant yield, but also control wavelengths that are ineffective for plant growth. In addition, relevant experiments were also carried out to test whether LED lamps can reduce the lighting cost of greenhouse cultivation. Red and Blue LED5: 1 good performance red light LED to increase plant material, scientists take hydroponic cultivation tomato as the test object, with three kinds of red and blue light LED lamp ratio, respectively according to three kinds of light intensity for a period of 120 days of test, at the same time, it is compared with other light supplement methods, including high pressure sodium lamp, red light LED lamp, half high pressure sodium lamp and half red light LED lamp, and no light supplement, etc. The results show that the five illumination modes with high fruit yield are red and blue LED ratio 5:1 high light intensity, 5:1 medium light intensity, 5:1 low light intensity, 19:1 high light intensity, and 100 LED illumination. The effect of using LED lighting to assist plant growth is better than that of high-pressure sodium lamp, which also indicates that there is an improved lighting method in greenhouse cultivation. On the other hand, the experimental results also show that high illumination increases plant growth substances and fruit yield. The ratio of 19:1 can produce more plant substances, and 5:1 can increase fruit yield. Researchers at McGill University pointed out that increasing the number of red-light LED lights can increase plant substances, and fruit production is slightly reduced. Therefore, LED plant lamps are considered to be a very helpful method for strengthening the artificial lighting system in the greenhouse.