The LEDs have long been recognized for their many advantages over traditional light fixtures. Their long life span, energy efficiency and flexibility have made possible using LED lighting for a variety of applications. LED lighting is now commonly used in the agricultural sector.
Plants respond to the intensity and quality of light. Artificial lighting is frequently used to control plant growth under various conditions. Plants differ in the need for light, and most plants will grow in either natural or artificial light.
If the light is an obvious need for plant growth, it is also one of the least understood for greenhouse cultivation factors. In addition, lighting is often considered less important than the nutrition of plants. However, it is important to supplement natural day light in greenhouses. Many traditional lighting technologies can not be used because they result in excess heat, which can be harmful to plants. Photosynthesis is the use of light energy to decompose water and to transfer hydrogen from it to carbon dioxide in the presence of chlorophyll. For plants to grow well in a greenhouse, there should be a temperature and a light adapted to the plant. These conditions should allow optimal absorption of chlorophyll, essential for photosynthesis and plant growth. In recent years, research has shown that the plants are more sensitive to some particular wavelengths of light. Indeed, absorption of chlorophyll photosynthesis is increased when the plants are exposed to red light (640-660 nm) and blue (450 nm). These studies showed that the absorption peaks of the chlorophyll are within the ranges of 400 to 500 nm and from 600 to 700 nm.
Until now, HPS (High Pressure Sodium) Light Bulbs were commonly used for lighting greenhouses and plants. The study of the absorption peak of chlorophyll shows that most of the light output of HPS lamps is located outside the ranges of the chlorophyll absorption peak. In addition, a 2-hectare greenhouse using HPS lamps will consume about 10,000 megawatt hours of electricity per year. Research has shown that only 7 percent of the light generated by the HPS lamps are absorbed by plants, and much of the energy produced by these grow lamps is therefore wasted.
Greenhouse and horticulture can benefit from energy savings and increased energy efficiency by using LED lighting. With LED lighting, energy savings can be considerable. In addition to these energy savings, the use of specific LED can help stimulate photosynthesis and plant growth. LED technology is more effective in stimulating plant growth through the use of correct wave lengths, while significantly reducing energy consumption. LEDs do not produce heat so that the grow lights can be positioned almost directly above the plants. Using LED luminaires specifically designed for wet environments, it is possible to use waterproof lighting for greenhouses that makes it possible for the plant to growth healthy while enabling a significant decrease in energy consumption.
The luminaire TR3 Airfal has a degree of protection IP67, which offers total protection against dust and water. This light fitting is suitable for a multitude of applications, including agricultural and horticulture applications, such as greenhouses.