The wavelength of the plant light

The wavelength of the grow light 1. The visible light wavelength of the LED grow light (4*10-7m----7*10-7m) Light color----------wavelength λ(nm)---- ------Represents wavelength red (Red)-----780～630-------700 Orange (Orange)--630～600---------- 620 Yellow --600～570----------580 Green --570～500----------550 Cyan---500～ 470----------500 Blue---470～420----------470 Violet-420～380--------- -420 2. The color temperature and lumens of the plant lamp The color temperature and lumen of the plant lamp are seen from the human eyes, and the photosynthesis of the plant does not depend on the color temperature and lumens. Different plants have different requirements for the spectrum, such as red/blue 4:1 for lettuce, 5:1 for strawberries, 8:1 for general purpose, and some need to increase infrared and ultraviolet.

3. Influence of spectral range on plant physiology 90e177eb2de9b62d82a7f685dc24fb2.jpg 280~315nm - minimal impact on morphology and physiological process 315~400nm - less chlorophyll absorption, affecting photoperiod effect, preventing stem elongation 400~520nm (blue) ——The absorption ratio of chlorophyll and carotenoids is large, which has a great influence on photosynthesis 520~610nm (green) ——The absorption rate of pigments is not high 610~720nm (red) Significantly affects 720~1000nm - low absorption rate, stimulates cell extension, affects flowering and seed germination > 1000nm - converts into heat From the above data, the plant lamp manufacturer analyzes the effect of light at different wavelengths on plant photosynthesis It is different. The light required for plant photosynthesis has a wavelength of about 400~720nm. 400~520nm (blue) light and 610~720nm (red) contribute greatly to photosynthesis. The light of 520~610nm (green) has a very low rate of absorption by plant pigments. 4. The principle that white light is not good for plant growth According to the above principle, plant lights are made in three forms: red and blue combination, all blue, and all red to provide light with two wavelengths of red and blue, covering the wavelength range required for photosynthesis. . Visually, the red and blue combination of plant lights is pink. For white LED lamps, a blue core is commonly used to excite yellow phosphors, which combine to produce visual white light. On the energy distribution, there are two peaks in the blue region at 445 nm and the yellow-green region at 550 nm. The 610~720nm red light required by plants is lacking. This explains why plants grow unfavorably under the illumination of white LEDs.