What Is a Black Light?

Have you ever wondered what a black light is? Did you know there are different types of black lights? Here's a look at what black lights are and how you can find and use a black light.

What Is a Black Light?

A black light is a lamp that emits ultraviolet light. Black lights also are known as ultraviolet lamps.

Why Is a Black Light Called a "Black" Light?

Although black lights emit light, ultraviolet light is not visible to human eyes, so the light is 'black' as far as your eyes are concerned. A light that only gives off ultraviolet light would leave a room in apparent total darkness. Many black lights also emit some violet light. This allows you see that the light is on, which is helpful in avoiding over-exposure to ultraviolet light, which can damage your eyes and skin.