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Shortwave/Longwave Ultraviolet Lamp. Check whether a gemstone fluoresces to longwave or shortwave ultraviolet light.
Specification: Power Input: 220V 50HZ Wavelength: SW 253.7nm Wavelength: LW 365 nm
Caution: The invisible radiations emitted by UV lamps, particularly short wave, can be harmful to the skin,and dangerous to the eyes.
These lamps should never be looked at directly when using