How is a Woods lamp different from other UV lamps?

The Woods lamp is distinct from other UV lamps in several key ways:

1. **Specialized Filter**: The Woods lamp uses a unique filter called Wood's glass, which is made of barium-sodium-silicate glass with 9% nickel oxide. This filter blocks most visible light and allows primarily UV light to pass through .

2. **Peak Wavelength**: The Woods lamp emits UV light with a peak wavelength of 365nm, while other UV lamps may have peak wavelengths of 375nm, 385nm, or 395nm. The specific 365nm wavelength is particularly effective for detecting fluorescence in skin conditions .

3. **Fluorescence Effect**: Due to its specialized filter and precise wavelength, the Woods lamp produces a stronger fluorescence effect when used to detect skin conditions. This makes it more effective for medical diagnoses compared to general UV lamps .

4. **Magnification**: Some Woods lamps have the added feature of magnifying objects by 1.5 times, which is not typically found in standard UV lamps .

5. **Medical Applications**: The Woods lamp is specifically designed for medical use, particularly in dermatology, for detecting conditions like fungal infections, pigment disorders, and certain skin cancers. While other UV lamps may be used for similar purposes, they are not specifically calibrated for medical diagnosis .

6. **Visibility of Results**: The Woods lamp is designed to be used in completely dark rooms, which enhances the visibility of fluorescence. Other UV lamps may not be as effective in creating the necessary dark environment for optimal results .

In summary, while all Woods lamps are UV lamps, not all UV lamps are Woods lamps. The Woods lamp has specific features that make it particularly effective for medical diagnostics, especially in dermatology.

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