The Sun is a source of the full spectrum of ultraviolet radiation, which is commonly subdivided into UV-A, UV-B, and UV-C. The typical light source spectrum wavelength ranges from Ultraviolet Light (UVC 200 to 280nm, UVB: 280 to 315nm, UVA 315 to 400nm) to Visible Light (400 to 760nm) and Infrared Light (760 to 3000nm). LED UV lights have a narrow spectral output centered around a specific wavelength, +/- 10nm. Phoseon products use 365nm, 385nm, 395nm, or 405nm wavelengths. This near-monochromatic distribution (see chart) requires new chemical formulations to ensure proper curing of inks, coatings, and adhesives.
The majority of standard UV curing happens in a narrow emission range with the remainder of the spectral output generating unneeded and potentially harmful UV-C and infrared emissions. UV LED lights provide this narrow emission range.
UV LED curing light sources efficiently convert 20-40% of the input electrical power into usable UV light with no harmful UV-C or infrared exposure. That efficiency translates into approximately 80% power and heat savings over mercury based lamps. Request more information about LED UV wavelength