Application analysis of LED plant lights in photosynthesis Mar 20 , 2022

1. Knowledge of LED lamps for planting plants

  • Different wavelengths of light have different effects on plant photosynthesis. The wavelength of light required for plant photosynthesis is about 400-700 nm. Light at 400-500nm (blue) and 610-720nm (red) contributed the most to photosynthesis.
  • Blue (470nm) and red (630nm) LED tube lights for plant growth can provide the light that plants need. Therefore, the ideal choice for LED tube lights for growing plants is to use a combination of these two colors. In terms of visual effects, the combination of red and blue plant growth lights presents a pink color.
  • Blue light can promote the growth of green leaves; red light can help flowering and fruiting and prolong the flowering period.
  • The ratio of red and blue LEDs of LED tube lights for plant growth is generally between 4:1--9:1, generally 4-7:1.


When using a plant lamp to supplement light for plants, the height from the leaves is generally about 0.5 meters. Continuous exposure to the plant lamp for 12-16 hours a day can completely replace the role of the sun.


2. Bulb Configuration for LED Tube Lights for Plant Growth

Proportioned lights can make strawberries and tomatoes sweeter and more nutritious. Illuminating holly saplings with LED plant lights mimics the photosynthesis of outdoor plants. Photosynthesis refers to the process by which green plants use light energy to convert carbon dioxide and water into energy-storing organic matter and release oxygen through chloroplasts. Sunlight is made up of different colors of light, and different colors of light have different effects on plant growth.

LED light sources are also called semiconductor light sources. This light source has a relatively narrow wavelength and can control the color of the light. Using it alone to irradiate plants can improve plant varieties.

The holly shoots tested under the violet light of the LED tube lights on which the plants were grown grew tallest, but had small leaves and shallow roots that looked malnourished. The seedlings in the yellowish light are not only dwarfed, but the leaves look lifeless. Holly grown in a combination of red and blue light grows best, not only strong, but also with a well-developed root system. The red and blue bulbs of this LED light source are configured in a 9:1 ratio.

The results showed that the 9:1 ratio of red and blue light was the most beneficial to plant growth. After the light source was irradiated, the strawberries and tomatoes were plump, the sugar and vitamin C contents increased significantly, and there was no hollow phenomenon. With 12-16 hours of continuous light per day, strawberries and tomatoes grown under such a light source will taste better than ordinary greenhouse fruits.

Led Tube Lights For Plant Growth


Quanxing Optoelectronics (Shenzhen) Co., Ltd. can customize red and blue grow lights that perfectly meet your needs according to your planting project.

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