UV Basics

Ultraviolet light belongs in the electromagnetic spectrum with a wavelength in the range of 200 to 400 nm (nanometers), which is shorter than that of visible light, but longer than X-rays. All UV rays and bands are invisible to the human eye.

The UV spectrum can be subdivided into the following bands:

UV-A (long-wave; 400 - 315 nm): used for black lights, skin tanning, ink/resin curing.

UV-B (medium-wave; 315 - 280 nm): used for psoriasis therapy, can cause sunburn, skin cancer.

UV-C (short-wave; 280 - 200nm): most effective for germicidal disinfection.

UV-V (vacuum UV, below 200 nm): can produce ozone in the air.

  • UV Basics


    Ultraviolet light belongs in the electromagnetic spectrum with a wavelength in the range of 200 to 400 nm (nanometers), which is shorter than that of visible light, but longer than X-rays. All UV rays and bands are invisible to the human eye.

    The UV spectrum can be subdivided into the following bands:

    UV-A (long-wave; 400 - 315 nm): used for black lights, skin tanning, ink/resin curing.

    UV-B (medium-wave; 315 - 280 nm): used for psoriasis therapy, can cause sunburn, skin cancer.

    UV-C (short-wave; 280 - 200nm): most effective for germicidal disinfection.

    UV-V (vacuum UV, below 200 nm): can produce ozone in the air.