Lighthouse UV Test Lamp - Short Wave
Lighthouse short wave UV light.
Peak radiation efficiency at 254nm. For phosphorescence detection of stamps from Great Britain, USA, Israel, Finland and older issues from Canada and Mexico. Hand held portable model requires 4 UM AA batteries.
If you are working on Machin definitive stamps after 1991, when the design of the perforations changed, you will also need a longwave lamp (see elsewhere in store).
Do not look directly into any ultra violet lamps.