Light is undoubtedly the basis of life for living organisms. The wavelength range recognised by humans as visible light is between 400 and 700 nm, below this range we are within the ultraviolet or UV radiation range.
More specifically, if the wavelength is in the spectral range between 315 and 400 nm, we are talking about UVA radiation. This is often artificially generated for technical applications such as the polymerization of paints, resins and adhesives, luminescence and fluorescence testing, and non-destructive testing.
This also includes long-wave UV-A radiation, better known as black light lamps or Wood’s lamps.