LED plant lighting: effects and characteristics of different wavelengths

- Jul 16, 2019-

Effects of spectral range on plant physiology 280 ~ 315nm;

The effect on morphology and physiological process was only 315 ~ 400nm.

Chlorophyll absorption is less, which affects the photoperiod effect and prevents stem elongation from 400 ~ 520nm (blue).

The absorption ratio of chlorophyll and carotenoids was the largest, and the effect on photosynthesis was 520 ~ 610nm (green).

The absorption rate of pigment was not high, 610 ~ 720nm (red).

The chlorophyll absorption rate is low, which has a significant effect on photosynthesis and photoperiod effect.

Low absorption rate stimulated cell prolongation and affected flowering and seed germination > 1000nm;

Converted into thermal LED plant lights features:

1. Different wavelengths of light have different effects on plant photosynthesis. The wavelength of light needed by plant photosynthesis is about 400-700nm. Light from 400 to 500nm (blue) and from 610 to 720nm (red) contribute the most to photosynthesis.  

2. Blue (470nm) and red (630nm) leds provide just the right amount of light for plants, so it's ideal to use these two color combinations. Visually, the red and blue combination of plant lights appears pink.  

3. Blue light is helpful for plant photosynthesis to promote the growth of green leaves, protein synthesis and fruit formation; Red light can promote the root growth of plants, help to bloom and fruit and extend the flowering period, play a role in increasing yield!  

4. The red and blue LED ratio of LED plant lamp is generally between 4:1-9:1, and 6-9:1 is usually acceptable.  

5. When the plant lamp is used to fill the light for the plant, the general height from the leaf is 0. About 5-1 meter continuous exposure for 12-16 hours a day can completely replace sunlight. 6, the effect is very significant, the growth rate is almost three times faster than the general natural growth of plants.  

7. Solve the problem of lack of sunlight in greenhouses in winter, promote chlorophyll, anthocyanin and carotene needed by plants in photosynthesis, make fruits and vegetables harvested 20% earlier, increase yield by 3-50%, improve sweetness of fruits and vegetables and reduce pests and diseases.  

8. LED light source, also known as semiconductor light source, has a narrow wavelength and can emit light of a specific wavelength, so it can control the color of light. By shining it on plants alone, it can improve plant varieties.  

9. LED plant growth lamp has low power, but high efficiency. Because other lights emit a full spectrum, which means there are 7 colors, while all plants need is red and blue light. LED plant growth lights can emit specific red and blue light needed by plants, so they are extremely efficient, which is why LED plant growth lights with power of a few watts are better than those with power of tens or even hundreds of watts. Another reason is the lack of blue light in the spectrum of traditional sodium lamp, and the lack of red light in the spectrum of mercury lamp and energy-saving lamp. Therefore, the filling effect of traditional lamp is much worse than that of LED lamp. Besides, compared with traditional lamp, more than 90% of electric energy is saved, and the operation cost is greatly reduced.

Advantages of LED plant lights:

1. Standard power socket connector for drivers or cooling fans is not required.  

2. Plants need red and blue wavelengths to grow.  

3. Compared with other general lighting equipment, LED plant light line is mild and won't scorch seedling plants.  

4. It can save 10% ~ 20% electricity cost compared with other plant lighting. 5. Blue light helps plants grow taller, while red light makes them bloom and bear fruit.

  As with growing plants outdoors, the growth of plants needs to be combined with many other factors that affect the growth of plants, such as carbon dioxide concentration, ambient humidity, temperature, air quality, water and other nutrients.

  From the perspective of indoor plant lighting, we advocate the use of LED plant growth lights, so how does LED plant light affect plant growth?

LED plant lights control the light cycle to affect the growth of plants

All living things on earth have their own schedules. People need to work and rest. Animals need to; The same. Plants also have time to work and time to rest, which we call the photoperiod.

Plants grow in the open in nature, each of these plants have formed their own light cycle genes, but because of various natural uncontrollable factors, the growth of their true talent has not been fully excavated, LED lights will plant from outdoor to indoor, a variety of conditions can be completely controlled, activate the growth of the plant cells, completely control plant LED plant light light cycle, which affects the growth of plants.

LED plant lights affect plant growth by controlling light intensity

Light intensity on plant cell proliferation and organ differentiation has very important influence, is also has important effect on the growth of plants, different light intensity affects all stages of plant growth, plant growth early don't need too strong light, can satisfy the need of plant growth and germination, the growth of the plants, the light intensity to be appropriately increased, robust and tidy degree of seedling is very important, when the plants blossom and bear fruit, LED plant light directly affect flowering and fruit setting rate, but also determine the plant's production and quality.

LED plant lamp custom control light quality affects plant growth

Plant lighting LED lamp plant growth lamp bead mainly red lights, blue lights, white light bead and full spectrum light bead, is using the spectral lamp bead, because countless test showed that plant growth needs most is red and blue light, LED plant light white light bead is in order to replenish the spectral composition of plant growth may require other, full spectrum LED plant light lamp bead is red and blue light spectra from the core, light environment the allure of the callus and organ differentiation also has a significant effect, when the plants blossom red spectrum plays an important role in particular.

The influence of LED plant lamp on plant growth is mainly achieved by controlling light quality and light intensity and adjusting plant light cycle. When purchasing LED plant lamp, you should pay special attention to the light intensity and light quality corresponding to the planted plants.