Food And Drug Administration

The collapse of a booth might cause electrical shock, fire or direct physical injury. This can be prevented by designing the booth to have had enough strength and rigidity to resist the stress of use and to withstand the impact of a falling person.

A person can be cut and seriously injured by falling into or bumping against bare sunlamps. This could be prevented by use of physical barriers around the lamps, such as heavy grid wires or ultraviolet transmitting plastics, which are sturdy enough to withstand the impact of a falling person.

Rapid entrance into or exit from the booth is essential in emergencies. This can be assured by use of doors which open outwardly and are opened easily from both inside and outside of the booth. The potential for injuries from falls can be reduced by use of hand rails and floors which provide adequate traction for wet or dry bare feet.

Skin tanning results from exposure of the skin to ultraviolet radiation in the wavelength region between 260 and 400 nanometers. This region is conventionally subdivided into UVB short wavelength radiation (260 nm to 320 nm) and the longer wavelength UVA radiation (320 nm to 400 nm). Tanning results when melanin pigment is formed in the skin following exposure to ultraviolet radiation. There are two processes for tanning that occur.

Immediate pigment darkening results from photo-oxidation of melanin already present in the melanocyte cells of the skin basal cell layer and is caused primarily by long wavelength ultraviolet radiation.

Delayed tanning results from production of new "packages" of melanin pigment called melanosomes. UVB radiation is much more efficient than UVA in this process.

The FDA considers sunlamp products (defined in 21 CFR 1040.20 (b)(9) and ultraviolet lamps (defined in 21 CFR 1040.20 (b)(11) to be both electronic products and medical devices. Therefore, these products and their manufacturers are subject to both the Radiation Control for Health and Safety Act of 1968 (transferred to Chapter V of the Federal Food, Drug and Cosmetic Act in 1991) and the Medical Device Amendments of 1976 (which amended the Food, Drug and Cosmetic Act).