Lighting, in other words, the process of converting electrical energy into light energy. During this conversion, a large amount of heat is generated, and CO2 and some harmful gases are released. The green lighting advocated today is to reduce the emission of greenhouse gases and pollutants in the process of lighting. Green lighting promotes the development and application of semiconductor technology. The LED industry research report shows that LED lighting has reached 17.6% in the global lighting industry.
Principles and benefits of LED lighting technology
LED is the abbreviation of light emitting diode, which is LED. The main part of the LED is a semiconductor wafer, which is connected to the negative electrode, the positive electrode and the support, respectively, and is encapsulated by epoxy resin. The semiconductor is a combination of P-type and N-type semiconductors to form a stable structure. When a current flows through the wafer, the electrons are pushed toward the P terminal. The electrons in the P terminal are combined with the holes, and the minority carrier and the majority carrier are injected to emit energy in the form of photons. Electrical energy is converted into light energy.
LED lighting is used in various large chicken farms, showing many excellent features different from traditional lighting tools. For example, compared with ordinary lighting tools, LEDs are more than twice as efficient as that.
There are also other many advantages to use LED lighting in large chicken farms, mainly as follow:
- LED lighting tools have high luminous efficiency. In the future development, it may increase by about 3 times, so it has a good development prospect and room for improvement, and meets the objective needs of the lighting work of the chicken farm.
- LED lighting tools can be adjusted in terms of brightness and light color, which enables LED lighting technology to fully meet the requirements of large farms for light intensity and light color. Compared with traditional light source LED lighting tools, it has obvious advantages.
LED lighting technology in large chicken farm
Traditional light sources for large chicken farms include tools such as incandescent lamps and energy-saving lamps. These conventional light sources exhibit disadvantages such as low luminous efficiency, short life, and easy deterioration, and the luminous intensity and light color are not easily controlled.
LED lighting as a new type of light source, its luminosity is high, and experts have shown through experiments that: in the growth stage, laying hens can use LED lighting to improve the uniformity of the size of the laying hens, reduce the cost of feeding, and reduce the death rate of young chickens.
For adult chickens, the use of LED lighting tools can effectively control light intensity and color, thereby increasing the yield and consumption rate of broilers, increasing the laying rate of laying hens, and reducing the number of soft eggs.
Below table shows the effects of various light colors on laying hens.
|white||natural, fresh||cold emptiness|
The application of LED dimming technology
In order to more effectively control various light-emitting parameters such as color temperature, light intensity, and light color of LEDs, most LED lighting lamps on the market use a constant current driving method. Today, many large-scale farms use ordinary lighting tools for 24 hours of uninterrupted lighting, but different stages of chickens have different requirements for lighting conditions, so in order to ensure the healthy growth and development of chickens of different ages, It is necessary to control the illumination intensity and the illumination time. And if you use the LED system, you can adjust the sensitivity of light intensity and chromaticity for chickens in different time periods, which can greatly promote the growth of chickens and increase the yield of eggs and chicken. For laying hens, the intensity of light directly affects the laying rate and soft egg yield of laying hens. Most chicken companies can effectively adjust each process in the process of using LED dimming technology. Reasonable light intensity and light color output in a time period ensure egg production rate and healthy growth of laying hens and broilers respectively.
The application of LED heat dissipation technology
LEDs generate less heat than conventional lighting tools, and they dissipate heat quickly. The electroactive effect of the combination of electron and hole radiation migration translates into light energy at a conversion rate of 20% to 30%. Because the light-emitting part is small in size and the heat-dissipating structure is scientific, the LED generates less heat energy. Even if it emits the same intensity of light as the conventional general lighting tool, it consumes less energy, which ensures the economic benefits of the enterprise. Moreover, due to the high luminosity of the LED, the luminescence of the luminescent material is very small, and the brightness does not change for a long time. Because the environment in large chicken farms is very harsh, and the average lighting tool life is only a few hundred hours, and the LED life is dozens of times that of ordinary lighting tools, it seems that the use of LED lights will greatly reduce the replacement cost. And the cost of using electricity.
The application of LED power drive technology
Today, constant current drive is now the more common LED drive method, the current increases, the brightness will also change, so it can meet the lighting needs of a variety of conditions. According to the relevant experimental procedures and results, the current and voltage of the LED are analyzed. Under normal application conditions, the forward voltage of a single LED is 3.0~3.5V. When a voltage of 5V is applied across a constant-voltage 3.3V LED, it is found that its current has not changed, thus avoiding a change in current due to a change in voltage. At the same time, when the current is stable, the brightness of the LED becomes more stable, which can effectively reduce the variation of the driving power. This kind of driving method will make the chicken’s stress less. If the warm light adjustment spectrum of color temperature 2700K (close to incandescent lamp) is used, the color temperature is increased to 6800K. The experiment proves that it has no effect on the production of laying hens.
With the advancement of society and the development of technology, LED lighting technology has become an irreversible development trend today. As LED technology is still in the development stage, breakthroughs in its key technologies will become an important factor in the popularity of LED lighting. In future research work, the color temperature variable technology can be optimized to make the spectral saturation more favorable, improve the optical index such as light efficiency, reduce the drift of color temperature and luminous flux, and further expand the adjustment range of color temperature.