LED lighting technology has made remarkable achievements in the last 10 years. Although the LED light source and crystal lighting market have grown rapidly over the past few years, compared with other illumination industry, the application time of LED light source in horticultural production is only nearly two years.

The application of LED light source in the horticulture industry largely is due to the obvious advantages of LED lighting technology. LED can provide for a high-power light source combination of specific wavelength, flower growers have been obvious to appreciate its benefits: energy conservation and lighting efficiency improvement.

Greenhouse plants grow perfectly is based on the right temperature and light, which is good for synthesis of chlorophyll and other photosynthetic pigments as well as plant growth. In recent years, academic studies have confirmed: plants are more sensitive to specific wavelengths of light, the absorption of chlorophyll could be increased when the photosynthesis is under wavelength for 640-660 nm of red light around 450 nm of blue light.

Advantages compared between LED light and high pressure sodium light

High pressure sodium lamp is the most common supplementary source for greenhouse. After contrasting the relationship between high-pressure sodium lamp spectral and absorption peak of chlorophyll, it is found that most output of high-pressure sodium light is beyond the range needed of chlorophyll absorption peak value. Studies showed that only 7% of the light is absorbed by plants when high-pressure sodium lamps lights up the greenhouse, the vast majority of light is wasted.

Energy saving is realized after taking use of LED light source alternative to high-pressure sodium lamps. In addition to energy-saving advantages, the use of chlorophyll absorption peak matches with the specific light spectrum LED module can also ensure the output of plant photosynthesis and plant growth effectiveness. Not only provides the specific wavelengths light needed by plants, but also reduces the cost of electrical energy significantly by using the advanced and efficient LED-light technology. Thus promote plant growth effectively.

Positive impact and development potential

Research has shown that: a specific wavelength of light and ray of light can increase plant production or increase the biomass of some fruits and vegetables. The required number of joule per kilogram product can be decreased after using more pre-determined ray of light. In addition, more than 20% of production could be improved meanwhile improve product quality and extend the production cycle after taking use of appropriate combinations of light.

The studies are also continuing of improving the rate of photosynthesis and other wavelengths of light needed by plant growth, the study focused on the positive impact in saturating light (infrared and others) at different plants growth stages. With the improvement of LED technology in the future and people realize more deeply on the process of plant growth required of a specific wavelength of light, which will make the world horticultural industry enter into the revolutionary new stage of development.