2010년 12월 29일 수요일
2010년 12월 24일 금요일
3. How do plants grow with LED lighting?
Brightness of suitable lighting for plants
The unit commonly used is based on human visual senses since most of the lights have been developed for people. However, photosynthesis is not perceptible for the human sight.For example, the reception of the blue wavelength (450nm) is 3,8%. If the green wavelength has the same energy as the blue wavelength, the human sight perceives a wavelength of about 4%. In order to create efficient light intensity in growing plants, we must agree on a unit based on the photosynthesis characteristics.PPFD(Photosynthetic Photon Flux Density)
Differences between classic lighting and LED lighting to influence plants activities and processes
Even if the artificial lighting is as bright as for the human perception (real life simulation), there is a significant difference observed for plants depending on the lights used. As bright as 10.000 lx and in the same conditions, the extent of what plants perceive of LED lighting for growing is several times more effective than with a simple light bulb or a fluorescent lamp. Concerning photosynthesis application, LED lighting makes it possible to achieve maximum efficiency by just using a narrow wavelength. LED lighting on plants is therefore a successful and valuable necessity.
The unit commonly used is based on human visual senses since most of the lights have been developed for people. However, photosynthesis is not perceptible for the human sight.For example, the reception of the blue wavelength (450nm) is 3,8%. If the green wavelength has the same energy as the blue wavelength, the human sight perceives a wavelength of about 4%. In order to create efficient light intensity in growing plants, we must agree on a unit based on the photosynthesis characteristics.PPFD(Photosynthetic Photon Flux Density)
Differences between classic lighting and LED lighting to influence plants activities and processes
Even if the artificial lighting is as bright as for the human perception (real life simulation), there is a significant difference observed for plants depending on the lights used. As bright as 10.000 lx and in the same conditions, the extent of what plants perceive of LED lighting for growing is several times more effective than with a simple light bulb or a fluorescent lamp. Concerning photosynthesis application, LED lighting makes it possible to achieve maximum efficiency by just using a narrow wavelength. LED lighting on plants is therefore a successful and valuable necessity.
2010년 12월 23일 목요일
2010년 12월 22일 수요일
3. How do plant grow with LED lighting?
Range of effects a wavelength has on a plant
Wavelength absorption of plant: chlorophyll operation(440nm, 655nm),
photosynthesis operation(430nm, 670nm)
Detection wavelength of insects: 280nm ~ 580nm
Detection wavelength of fish: 480nm ~ 510nm
Wavelength absorption of plant: chlorophyll operation(440nm, 655nm),
photosynthesis operation(430nm, 670nm)
Detection wavelength of insects: 280nm ~ 580nm
Detection wavelength of fish: 480nm ~ 510nm
3. How do plants grow with LED lighting?
Solar radiation has various diffusions and absorption is only possible with wavelengths from 300nm to 3.000nm.Human eyes perceive 380-780nm wavelengths, and distinguish between light and color. The light of the green color (555nm) is detected more sensibly than the other colors.Radiation effects to plants is physically effect radiation (300-800nm)and photosynthesis effect radiation(PAR : 400~700nm). Those radiation absorb mid-blue colors and red colors, reflect green colors(so plants reflect green color seen green)
2. Necessity of LED lighting for growing lighting.
Change of climate and environment
At present, the world is facing food crisis caused by climate change and
industrialization resulting in the decrease of crop harvests. This crisis is
foreseen to get worse over time.
The demands of the times-Energy Saving
Energy reduction is a worldwide trend that also includes the participation
from the agricultural industry. Objective: 2013, all incandescent light bulbs
disappear.
Environmentally friendly agriculture
Using over-dosed chemical fertilizer or pesticide for plants cultivation is an outdated technique, demands for growth also mean being harmless to humans and considering environmental problems.
PARUS LED lighting process technology
- Regardless of climate change, all-year-round production is possible.
- Over 80% more of energy saving than with light bulb.
- Environmentally friendly technology, using no mercury or heavy metal.
- No use of chemical fertilizer to effectively grow plants.
- LED lighting technology can dramatically reduce the use of pesticide and insect control.
The light revolution has begun: "The age of LEDs"
Human beings have constantly continued the expansion of space and time development with the invention of artificial lighting. Human productivity has increased by various application of artificial lighting since the time of Edison especially in the fields of agriculture, livestock and fishing industries.
At present, agricultural industries are facing a turning point with the advent of semiconductor LED. Existing lighting has a wide wave range designed for human sight. On the other hand, LED lighting has a capability of growing plants with computer accuracy emitting short wavelength that effects plants and insects.
During the 1960s, LED was first used to grow plants in outer space by NASA. Today, it is has many practical uses in various fields due to low-cost mass production. In the 1980s, Japan started applying LED to grow high-quality vegetables and flowers. Because of this, a steady supply of high-quality seedlings has been made possible to suppliers all-year round, as well as medicinal and industrial plants.
LED lighting is not just a general trend but becoming an essential tool for survival in today’s competitive market as its application becomes more diverse.
PARUS is the strong partner for raising your competitiveness in business environment, more so in these times of crisis.
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