Steve - Not quackery. Light is used for psoriasis. Supposed to be very efficacious. Used by many dermatologists for a variety of dermy probs. Haven't tried it myself- yet. But mine is so light anyways.
Hirsh Dermatology: Ultraviolet Light Therapy
www.hirshdermatology.com/uvlight.htmUltraviolet light is a safe and successful treatment option for many skin conditions including psoriasis, eczema, vitiligo, and many others. We are pleased to offer ...
Photodynamic Therapy for the Dermatologist
emedicine.medscape.com/article/1121517-overview - Similarto Photodynamic Therapy for the Dermatologist
1 Jun 2012 ... Overview; Mechanisms of Actions; Photosensitizers; Light Sources; Uses of Photodynamic Therapy in Dermatology; Adverse Effects and ...
http://emedicine.medscape.com/article/1121517-overview