In plant cultivation, spectrum optimization (i.e., adjusting the wavelength composition of light) can significantly affect the growth rate, morphological development, flowering and fruiting, and the accumulation of secondary metabolites (such as medicinal ingredients, flavor substances, etc.) of plants. Different plants and different growth stages have different requirements for light quality, so scientifically regulating the spectrum can maximize yield and quality. The following are key optimization strategies:
Plants mainly absorb light of 400–700 nm (photosynthetically active radiation, PAR), but light of different wavelengths has different effects:
Blue light (400–500 nm): promotes strong stems and leaves, inhibits excessive growth, regulates stomatal opening, and increases secondary metabolites (such as terpenes, anthocyanins).
Red light (600–700 nm): drives photosynthesis, promotes stem elongation, flowering and fruit development.
Far-red light (700–800 nm): affects light morphology (such as shade avoidance response), and regulates flowering time with the red light ratio (R:FR).
Green light (500–600 nm): penetrates the canopy and promotes photosynthesis in lower leaves.
UV (ultraviolet, <400 nm): small amounts of UV-B stimulate the synthesis of defense substances (such as polyphenols and flavonoids).
Seedling stage: At this stage, blue light (wavelength of approximately 450-495 nanometers) is key because it helps promote root development and leaf growth of plants.
Vegetative growth stage: During the vegetative growth period, it is ideal to use a balanced combination of blue and red light. Blue light continues to support leaf growth, while red light (wavelength of approximately 620-750 nanometers) promotes stem extension and overall biomass increase.
Flowering stage: Red light is particularly important during the flowering stage because it promotes flower formation and fruiting. Increasing the proportion of red light can improve yield and quality.
Full-spectrum lamps: Using full-spectrum LED lamps, the spectrum can be adjusted at different growth stages to provide light quality similar to natural sunlight. This flexibility helps optimize plant growth.
By precisely adjusting the light spectrum, growers can provide the best light quality for each growth stage of the plant, thereby increasing growth rate and yield.
Luxgrow is developed by photology engineers and more than 13 years R & D engineers team in led lights
As a professional and rich experience grow light designer and manufacturer for indoor greenhouse farms ; Luxgrow really knows offer the exclusive customized layout service is very necessary and cost-efficient.
We offer free exclusive customized layout service for customers , not only in the lighting configuration help,but also help you know the budget