An ultraviolet light source used to create special lighting effects with fluorescent materials. UV sources can be incandescent, fluorescent, or preferably HID lamps.

An electromagnetic radiation, similar to visible light but of shorter wavelength, which is emitted from the sun and from specially designed lamps. It often has an effect on resins, in some cases causing them (with the help of other chemicals called photoinitiators) to polymerise. In other cases natural UV can cause the breakdown over time of the resin in the cured film. The polymerising property is used in UV curing systems, while additives (UV absorbers) check the destructive properties of natural UV.

Isabelle Collin Dufresne (born 6 September 1935 in La Tronche, Grenoble, France; stage name Ultra Violet) is an French-American artist, author and former colleague of Andy Warhol.