Tube size 5 X 5/8 inches (130mm X 15mm) Click on the picture above, see the security markings on an old (pre-2017) twenty pound note, To see a five pound note under each UV torch (which gives you a good idea as to how they compare) click here. The fluorescent lamp with a shade so that overhead lights don't 'flood out' its effects. Wavelength: unknown, probably about 365mn 75 X 1. Read all about how UV light works; see lots of photographs of what you will see with UV light, click here.
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Joined in 2023 
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Joined in 2023 
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