The invention relates to a skin tanning chamber, the improvement comprising at least one light emitting diode emitting a UVA light, such as a UVA LED that emits essentially only UVA. Additionally, multiple LEDs of varying types with various characteristic wavelengths are controlled independently to produce...http://www.google.se/patents/US6861658?utm_source=gb-gplus-sharePatent US6861658 - Skin tanning and light therapy incorporating light emitting diodes
