Using sunscreen does not offer complete protection against the amount of UVA radiation of a tanning bed. The amount of UVA radiation produced by sunbeds can be 10 to 15 times the amount that people are exposed to when they are out in the midday sun.
Sunbeds primarily give off UVA radiation, but they also produce UVB emissions. There is no safety benefit to building up a tan using a sunbed rather than by tanning outdoors. Small bursts of intense exposure to UVA and UVB rays via a sunbed are dangerous, even if sunscreen is used. Tanning beds should be avoided by people who are fair skinned, have a lot of freckles or have a history of suffering from sunburn.