Abstract: A system and method for phototherapy, including skin tanning, lupus phototherapy, teeth whitening, hair growth and psoriasis phototherapies are provided. The system (1) includes a chamber adapted for at least one type of phototherapy and at least one UV LED, at least one nanostructure UV light emitting device or a combination of UV LEDs and nanostructure light emitting devices.

Abstract: A system and method for at least one of skin tanning and phototherapy are provided. The system includes a chamber adapted for at least one of skin tanning and phototherapy and a nanostructure UV light emitting device.

Abstract: A phototherapy method includes applying to skin a lotion which includes a carrier material and nanocrystals located in the carrier material, and exposing the lotion to photons of a first wavelength range such that the nanocrystals convert the photons of a first wavelength range into photons of a second wavelength range suitable for phototherapy and provide the photons of the second wavelength range to the skin.

Abstract: 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 an arbitrary light pattern in an arbitrary sequence over time. The chamber can be rigid or flexible. It can be a bed, booth or incorporated into a flexible form, such as a garment or cloth. In one embodiment, the chamber further comprises at least one LED emitting a UVC light, whereby the UVC light sanitizes the chamber surface. Preferably the LED emitting the UVA light is under independent control from the LED emitting UVC light.