Product Description： ·Item Include: 1 X Woods Lamp Analyzer ·Power source: 100V-120V/60Hz;220V-240V/50Hz ·Rated input power: 48W ·Wave length is approx: 365 nanometers The Wood lamp examination is a procedure that uses transillumination (light) to detect bacterial or fungal skin infections. It also can detect skin pigment disorders such as vitiligo or other irregularities in the skin. Sometimes the procedure is used to determine if you have a corneal abrasion (scratch) on the surface of your eye. The test can be called the black light test or the ultraviolet light test. What is the Color Mean ? *Light Blue: Normal Healthy Skin *Brown Fluorescent: Pigmentation and Dark Spots *Orange Points: Oily Skin *Purple and Dark Purple: Soft Skin, Dehydrated Skin, Skin Lacks Of Moisture *White Fluorescent: Thick Layer of Skin and Deak Cells *Light Yellow: Oily Acne Skin Working Principle: A Wood lamp is a small hand-held device that uses black light to illuminate areas that are otherwise difficult to see. The light is held over an area of skin in a darkened room. If present, bacteria or fungi will fluoresce (change color) under the light. Wood lamp is a device that emits ultraviolet (UV) light in the 365 nanometer range and is commonly used by dermatologists to assist in the diagnosis of various pigment and infectious disorders. The examination is performed in a dark room, allowing the Wood's light to shine directly on the affected area for a few seconds and looking for any changes in color or fluorescence. Normal skin does not fluoresce under the light of a Wood lamp. If a fungal or bacterial infection or pigment disorder is present, Wood lamp examination can strengthen or lessen the suspicion of a particular diagnosis, based on the color of fluorescence of the affected skin being illuminated. In addition, subtle changes in color may be detected as well.