Incandescent lights emit very little UV light, so they make poor black light sources. There are fluorescent lamps, incandescent lights, LEDs, lasers, and mercury-vapor lamps. Types Of Black LightĪs we mentioned earlier, the so-called black light comes in many different forms. However, some UV lamps and lasers emit only invisible radiation. That is what makes it possible to tell if the light is on or not. Most black lights look violet or blue because they emit short-wavelength visible light. If blacklight lamps only emitted ultraviolet light, it wouldn’t be possible to see it. The name “black light” comes from ultraviolet (UV) light being invisible to humans. All of these produce a unique spectrum of light.īlack lights can also be used to observe fluorescence – for example, in diamonds – to attract insects, in tanning beds, for artistic effects, to cure plastics, and for disinfection. There are several types of black light, including LEDs, incandescent lamps, special fluorescent lamps, and lasers. The name “Wood’s lamp” honors the inventor of glass UV filters, Robert Williams. Human vision can’t detect black light, so a room illuminated with black light still appears dark.Ī device that emits black light is called black light or Wood’s lamp. Black light is UV (ultraviolet) light or lamp that emits almost all of its light in the ultraviolet segment of the spectrum.
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