Types of UVB Lamps
There are two types of UVB lamps: Broad-band and Narrow-band.
The Broad-band lamps give 290-320 nanometer, having a peak wavelength of 306 nanometer.
Narrow-band lamps give a 311-313 nanometer, having a peak wavelength of 312 nanometer.
The Broad-band UVB lamps have a stronger medical effect on the skin than the Narrow-band UVB lamps, and they are more cost effective.
Both lamps are FDA approved for medical use in the treatment of skin diseases.
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