I have never heard of tanning beds before… what is that?
Light therapy has been used by dermatologists for many years, and suntanning was an interesting side effect. Since the first UV-A Sunlounge was developed (featuring a method of tanning pioneered by scientist Friedrich Wolff), tanning has become common in Europe and the United States. In the last 10 years, over 500,000 UV-A sun systems were sold in Europe.