To cultivate crops with indoor grow lights, use UVA (less than 20µmol/m²/s) with caution, and do not use UVB spectrum.
Benefits of UV Light for Growing Plants
Increasing the UV spectrum （UVA About 10µmol/m²/s） in LED grow lights can not only increase yield, but also improves the nutritional quality of lettuce
The test proves that UVA supplementation not only stimulates biomass production in controlled environments, but also enhances secondary metabolite accumulation.
Indoor cultivation of cannabis
The UV light（UVA About 10µmol/m²/s）increases production of secondary metabolites such as THC, CBD, terpenes and flavonoids but without the negative effects of UVB light.
UV light promotes the development and growth of plant rhizomes and improves branching. It is very important to enhance the quality of rhizomes during the seedling and vegetative growth stages of plants.
Tomatoes grown under grow lights without UVA light, with normal tomato internode distance
Tomatoes cultivated with grow lights, containing 10µmol/m²/s UVA light, very compact internodes
Cultivation of tomatoes with grow lights, containing 10µmol/m²/s UVA light, well-developed root system
Tomatoes are cultivated indoors using plant lights, containing 10µmol/m²/s UVA light, very compact internodes, short and strong stems, and well-developed root systems.
Disadvantages of UV Lights for Plants
Adding UV light to the plant lamp will make the plant dwarf, shorten the branch pitch, and inhibit flowering.
Improper use of UV lamps, especially UVB, can whiten the leaves of the plant. As a result of the whitening, the leaves cannot perform photosynthesis.
Leaves pale. In cases of Leaf Bleaching, no longer take in light
So we recommend that you use UVA with caution and not use the UVB spectrum.
If UVA light is required to improve crop quality, it is recommended to use UVA grow lights with individual dimming control.
Note: Tomato cultivation and cannabis cultivation have basically the same light requirements.