Plants do not need all wavelengths of visible light to grow, but only to absorb certain wavelengths of light. For example, during photosynthesis and flowering, the peak absorption of chlorophyll -- the red light around 660nm -- promotes growth. When a stamen is formed, the 450nm near blue light promotes growth.
Leds, which stand for Light EmittingDiode (LED), are a new type of high-efficiency solid-state Light source capable of emitting Light with just a little electrical energy.
Led light led line light led soft strip light
1. The PCB board is very soft, Chip RGB is used as the luminous body, the luminous Angle is 120 degrees, and each (50CM) has 15 LED(12VDC) and 24 LED(24VDC). The luminous body is evenly arranged on the strip PCB board, with soft color and even mixing light. It is a multi-purpose horizontal soft light strip with a very thin and small shape and 3M adhesive.
2. International famous manufacturer chip, high brightness light source, large Angle, good quality, stable performance.
3. Take three LED(12VDC) or six LED(24VDC) as a group, and according to the use length requirements, cut between each unit, very convenient to use.
4. Power: 3.6w / 0.5m /12VDC or 5.76w / 0.5m /24VDC.
5.LED center distance is 33mm or 20mm.
6. The internationally accepted DMX512 control system can realize various change effects such as color jump and gradual change of driver by driver, or the overall change can be controlled by the full-color controller CT308. Mainly used indoors, for small wall washing effect, interior decoration, landscape, etc.
7. Packing :5 m/coil disc or 0.5 m/strip.
LED the main features are: long life, low energy consumption, high chromaticity, environmental protection, easy maintenance, small volume, low voltage dc drive, drive, fast light, no stroboscopic, less glare, good shock resistance, and produce less heat, suitable for intelligent dimming control features, in recent years is one of the world's most promising high-tech fields. At present, LED luminous efficiency is far higher than all other light sources, showing obvious energy-saving effect in the field of lighting, for example, greenhouse supplement light (replace incandescent lamp) energy saving 90%, plant plant lighting (replace high pressure sodium lamp) energy saving more than 60%.
LED lighting terms:
Wavelength: the color intensity of light can be described by data, which is called wavelength. The wavelengths of visible light range from 380 to 780nm. Unit: nanometer (nm)
Brightness: brightness refers to the degree of brightness of an object, which is defined as the luminous intensity per unit area. Company: nit
Light intensity: refers to the brightness of the light source. That is to say, the physical quantity of the visible light radiation emitted by the light source in a certain direction and range. Unit: candlelight (CD)
Flux: the amount of visible light emitted per second by a light source. Unit: lumens (Lm)
Luminous efficiency: the luminous flux emitted by the light source divided by the power of the light source. It is an important index to measure the energy saving of light source. Unit: lumens per watt (Lm/w).
Chromatism: the degree to which the object is rendered by the light source. It's usually called the color index. Unit: Ra.
Color temperature: the color of the light emitted by the light source is the same as that of the black body at a certain temperature. The temperature of the black body is called the color temperature of the light source. Unit: kelvin (k).
Glare: the visual discomfort caused by extremely bright objects or strong brightness contrast in the field of vision is called glare. Glare is an important factor affecting the quality of lighting.
Synchronicity: two or more LED lights can run normally in the synchronous mode set by the program within no specified time. Synchronicity is the basic requirement for LED lights to achieve coordinated changes.
Protection grade: IP protection level is the lamps and lanterns is according the characteristic of the dust, prevent moisture to classification, composed of two Numbers, the first number represents the level of dust, prevent the outside shooting of lamps and lanterns (0-6), the second number represents moisture proof, waterproof lamps and lanterns of shooting the sealing degree (0 to 8), the greater the number said the higher degree of protection.
Opportunities and challenges:
The application of LED in agriculture and biology is expected to become a new field of development. LED illumination can reduce the cost of plant cultivation and bring more than 100 billion yuan of development space market data to LED industry:
LED only needs 0.27 kilowatt light source per square meter to reduce power consumption by about half. The total market size will reach 200 billion yuan
Light, an essential energy source for plant growth, has been developed by nanjing agricultural university as an alternative to sunlight -- LED (semiconductor light-emitting diode) plant growth lamps, which can be customized for different plants and different growing seasons.
Have magic power, light on plant photosynthesis, growth and development, morphogenesis, and material metabolism has a regulatory role, and the current in the greenhouse, greenhouse cultivation, make up for the lack of sunlight light source is usually used in the fluorescent lamp, high-pressure sodium lamp and incandescent lamp, such as the light source spectral energy distribution is designed according to the demand of the human eye to light, and needed for plant growth spectrum and human eye needs are not the same. According to the special subject research of south agricultural university, LED wavelength types are abundant, the scope of regulation is large, suitable for plant lighting.
For example, radish and green vegetables need different lighting control in the cultivation process, and can be configured with different LED lights according to their preferences. During the cultivation of sprouts, leaf size, chlorophyll or carotene and vitamin content can be adjusted by light.
LED lighting reduces the cost of growing plants
Factory seedling breeding has been an important support for modern agriculture, and it is also the first field of LED plant lights developed by nanyang agricultural university. In the seedling workshop, the seedlings of various flowers, trees and vegetables are arranged neatly on the shelves, and the upper end of each shelf is installed with LED lights. Most of these seedlings are used for export.
"Traditional light sources require 0.5 kilowatts per square meter, while leds require only 0.27 kilowatts, which can reduce power consumption by about half." Xu zhigang said. Energy saving is on the one hand, the application of this new LED light source, more can restore the original appearance of plant growth, now the greenhouse planted cucumbers, tomatoes and other taste is not good, there are reasons for the illumination is not standard.
It is understood that the research direction of this LED lamp has a lot of extension space, which can not only realize intensive plant production, reduce the use of plant hormones or other chemicals, but also can be used for the physical control of agricultural pests, using specific wavelength LED light to kill pests; It can also be used for animal breeding. LED light with specific wavelength can be used to promote animal production, reduce the occurrence of diseases, and reduce the use of feed additives and hormones.