Different wavelengths of light in the spectrum have different effects on plant growth. In the process of plant photosynthesis, they mainly utilize blue light (approximately 450-495 nm wavelength) and red light (approximately 620-750 nm wavelength). Although far red light (approximately 700-800 nanometers) is not within the main range of photosynthesis, it also plays an important role in certain stages of plant growth and development. Here are some advantages of LED lights in plant growth:

1. Photosynthesis: Red light is one of the most crucial spectra for plants to undergo photosynthesis. It helps the leaves of plants absorb light energy, thereby promoting the process of photosynthesis.
2. Growth regulation: Far red light has an impact on the hormone balance of plants, especially in response to gibberellins. Far red light can promote the elongation of plant stems and the expansion of leaf area.
3. Blooming stimulation: For some plants, far red light can trigger the flowering process. Plants recognize seasonal changes by sensing changes in far-red light, which usually prompts them to start flowering in the appropriate season.
4. Shape shaping: Using specific proportions of red and far red light can help control the shape of plants, such as promoting more compact plants and increasing branching.
5. Root development: Studies have shown that far red light may have a positive effect on the growth and development of roots, although research in this area is not as thorough as other spectroscopic studies.
6. Energy saving and efficiency: LED lights can emit light of specific wavelengths, which means they can provide targeted spectra to promote plant growth and reduce energy waste.
7. Reduce heat load: Compared to traditional plant growth lights, LED lights generate less heat, reducing the demand for cooling systems and thus reducing energy consumption.
8. Flexibility and Control: Modern LED growth lights are usually equipped with a control system that can adjust the spectrum and intensity according to different stages of plant growth, optimizing growth conditions.

In summary, LED lights provide a highly controllable light source that can simulate the spectral characteristics of the natural environment, thereby creating ideal conditions for plant growth. By adjusting the spectral combination of LED lights, growers can optimize the growth rate, morphology, yield, and quality of plants.