UVA (ultraviolet A band) and UVB (ultraviolet B band) are two different wavelength ranges of ultraviolet light. the wavelength range of UVA is approximately between 315 and 400 nanometers, while that of UVB is between 280 and 315 nanometers. These two types of UV light have different properties and areas of application.
In theory, UVA and UVB can be realized in the same luminaire. In practice, such lamps already exist on the market, called "full spectrum" or "broad spectrum" UV lamps, which are often used for specialized applications such as skin treatment, scientific experiments, industrial testing, etc. These lamps produce both UVA and UVB by using different types of emitters or a light source that emits multiple wavelengths. These lamps produce both UVA and UVB by using different types of UV emitters or a light source that emits multiple wavelengths.
However, it should be noted that since UV rays are potentially hazardous to human health, such luminaires need to be designed according to stringent specifications and appropriate safety measures must be taken when in use. For the average consumer, operating these devices without specialized knowledge may be risky. For specific applications such as plant growth, skin treatment or other specialized uses, consult a professional for appropriate advice.