Tanning occurs gradually through the stimulation and oxidation of melanin in the skin during exposure to ultraviolet rays. UVB (shorter ultraviolet rays) trigger melanin production deep in the skin. When these activated melanin granules travel to the surface, UVA (longer ultraviolet rays) cause the melanin to oxidize and turn brown. Too much UVB causes sunburn (erythema).

Natural sunlight contains an uncontrolled amount of UVB (burning rays); whereas indoor tanning controls both the UVA/UVB ratio and your exposure time, giving you the perfect balance for developing a deep, dark, healthy-looking tan.

Although some people may see a skin tone change after only one or two sessions; most people need 7 to 10 sessions to fully develop a tan. With a good base tan, 1 or 2 sessions a week will maintain a radiant, deep, dark tan throughout the year.

The application of light is absolutely essential to all life. There are various reasons, both biological and psychological, why exposure to light is beneficial. People also think they look better with a tan which makes them feel better about themselves.

It is difficult to measure the equivalency of the UV light emitted by indoor tanning equipment to that of the sun. Just as indoor tanning equipment and lamps differ in strength, the sun's strength is dependent on such factors as altitude, cloud cover and pollution. Therefore, it is important to follow the manufacture's recommended exposure schedule when tanning indoors and to wear sunscreen when outside.