LED biological lighting business opportunities Canada sold more than $1 billion 100 million

With the LED lighting application gradually expanded, more and more firms are aware of LED lighting business opportunities. Canada, for example, the annual sales of greenhouse vegetables and fruits more than 1 billion 100 million U.S. dollars, how to provide effective lighting for the greenhouse, greenhouse cultivation to become the key to increase production and revenue.

LED to replace the traditional high pressure sodium help plant growth

In terms of yield, greenhouse cultivation can be affected by light limitation, even if the temperature is moderate, nutrient and water content are sufficient. Canada Keele University (McGill University) researcher believes that the current greenhouse commonly used supplementary illumination way, such as the traditional high pressure sodium lamp, light source for plant growth is not the most effective, and actively seek alternative lighting.

The researchers pointed out that the light required for plant photosynthesis, the wavelength of 400 nm to about 700 nm, especially in the blue zone and red zone, the closest to the efficiency curve of plant photosynthesis. They believe that growers can use LED plant light, according to the needs of the combination of specific wavelengths of light, the light will be converted to photosynthetically active radiation. Not only can improve the yield of plants, but also to control the growth of plants is not effective wavelength. In addition, the relevant experiments were carried out to test whether the LED lamp can reduce the cost of greenhouse cultivation.

Red and blue LED 5:1 best red LED increased plant material

Scientists in hydroponics tomato as the test object, with three kinds of red and blue LED light proportion, respectively according to the three light intensity for 120 days of testing, and compared with several other light, including one hundred percent high pressure sodium lamp, one hundred percent LED lamp, high-pressure sodium lamp and LED lamp respectively, and no light etc..

The results showed that most of the five kinds of light yield of fruit, in the order of red and blue LED ratio of 5:1 high light intensity, 5:1 light intensity, 5:1 low light intensity, 19:1 high light intensity, as well as one hundred percent LED lighting. The use of LED lighting auxiliary plant growth, the effect is better than the high-pressure sodium lamp, but also that the greenhouse cultivation of improved lighting methods.

On the other hand, the experimental results also show that the high light intensity of plant growth substances and fruit production. 19:1 ratio can produce the most plant material, 5:1 can improve fruit yield. Researchers at the Keele University pointed out that the increase in the number of red light LED can grow plant material, fruit production is slightly lower. As a result, LED plant lights in the greenhouse artificial lighting system, the relevant researchers believe that is a very helpful way. (compile / LEDinside Angela Yang)

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