UVB (ultraviolet B segment) UV lamps are primarily used to simulate the ultraviolet B portion of natural sunlight, which is useful in some specific application scenarios, such as reptile breeding and certain types of gardening. However, for ordinary plant lighting, UVB is not necessary and can have adverse effects on plants. For plants, the effects of ultraviolet light (including UVB) are complex. Although some studies have shown that moderate UV exposure can promote some physiological processes in plants, such as enhancing disease resistance in plants, promoting the production of secondary metabolites, and altering the accumulation of plant pigments (such as anthocyanins), excessive UV exposure can have a negative effect on plants. 

The main potential hazards of UV lights, especially UVB lights, to plants include: leaf yellowing: Prolonged exposure to UVB may cause plant leaves to turn yellow or even fall off. Growth inhibition: UV exposure may cause plant growth to be inhibited, the stem becomes short, and the leaf surface shrinks. Cell damage: Intense UV exposure may damage plant cell structure, leading to bleaching, blistering and even death of the leaves. 

Therefore, in the plant lighting market, UVB lamps are not common and are usually used for specific needs, such as simulating lighting conditions in natural environments. For most plants, light sources in the visible range are sufficient to support normal growth and development. If considering the use of UVB lamps as part of plant lighting, caution should be exercised, and the timing and intensity of exposure needs to be strictly controlled to avoid harm to plants. In short, in the absence of specific needs, general plant lighting is not recommended to use UVB UV lamps, so as not to cause unnecessary harm. If it does need to be used, it should be adjusted according to the plant species and its sensitivity to UV rays.