A narrow-band UV-B phototherapeutic device includes: a light source unit that includes a fluorescent lamp of planar structure that is the ultraviolet light source for emitting narrow-band UV-B; a power supply for causing the fluorescent lamp to emit light; and a control unit for controlling the light...http://www.google.se/patents/US7241306?utm_source=gb-gplus-sharePatent US7241306 - Narrow-band UV-B phototherapeutic device
