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.

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