Ultraviolent lamps emit radiation with a wavelength between 10 nm and 400 nm. It falls below the visible light sprectrum. While prominent in sunlight, artificial sources of UV light are beneficial for a variety of tasks, including photography, barcoding, sterilization, forensic, geological, and biological analysis, polymer curing, and insect termination. Flourescent lamps are a primary source of UV radiation, though other UV emmiting devices like short-wave lamps and gas-discharge lamps are available.