Which UV radiation does NOT come from tanning equipment?

The correct choice highlights that UVC radiation does not come from tanning equipment. UVC is the most harmful type of ultraviolet radiation and is primarily absorbed by the Earth's ozone layer, preventing it from reaching the surface. Tanning equipment, whether it utilizes UV lamps for tanning or other forms of artificial tanning, primarily emits UVA and UVB radiation.

UVA radiation penetrates deep into the skin and contributes to aging and long-term skin damage, while UVB radiation is shorter and is primarily responsible for burning the outer layers of the skin. Therefore, both UVA and UVB are relevant to tanning equipment usage. UVC, however, is not emitted by these devices and is instead encountered mainly in other artificial light sources such as certain types of germicidal lamps used in medical or environmental disinfection. This distinction is crucial for understanding the specific risks associated with tanning and the types of UV radiation involved.