![]() ![]() Incandescent lights produce very little ultraviolet light, so they actually make poor black lights.įluorescent black lights typically cost a bit more than incandescent bulbs, but they are energy-efficient, don’t overheat, and bright. There are incandescent lights, fluorescent lamps, light-emitting diodes (LEDs), lasers, and mercury-vapor lamps. Types of Black Lightsīlack lights come in many different forms. Artificial corneas and lenses change the perceived spectrum, giving people vision more like what a raptor or insect sees. People who have eye surgery sometimes see further into the ultraviolet part of the spectrum than they did before. ![]() The photoreceptors of the human retina can detect black light. However, some ultraviolet lamps and lasers only emit invisible radiation. This makes it possible to tell when the light is on. Most black lights appear blue or violet because they emit short wavelength visible light (blue to violet). If a black light only emitted ultraviolet light, it would be invisible. Why Is Black Light Called “Black” Light?īlack light is called “black” because ultraviolet light is invisible to the human eye. These lights are not created equal, as each produces a unique spectrum of light.īlack lights are used to observe fluorescence, in tanning beds, to attract insects, for artistic effects, for disinfection, and to cure plastics. There are many types of black lights, including special fluorescent lamps, LEDs, incandescent lamps, and lasers. The name “Wood’s lamp” honors Robert Williams Wood, the inventor of glass UV filters. A device that releases ultraviolet light is called a black light, blacklight, or Wood’s lamp. Other names for black light are ultraviolet light or UV-A light. Black light is beyond the range of human vision, so a room illuminated with a black light appears dark. This entry was posted on Jby Anne Helmenstine (updated on May 10, 2021)īlack light emits is ultraviolet radiation, which is invisible or “black.” (photo: Kallemax)īlack light is ultraviolet light or a lamp that emits most of its light in the ultraviolet part of the spectrum.
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