Ultra violet light, smallest pocket torch, 9 LEDs

Summary

UV torch with 9 L.E.Ds .

Small and neat, works OK for simple tasks such as banknote detection in dim light.

Read all about how UV light works and what it will detect (fascinating article!)

See photos of what you will see with this (and all the other) UV lights.

Technical

Size: 85 X 20mm (3¼ X 1 inch)

Weight including battery: 45g

Light source: 9 LEDs

Wavelength: 395nm

Output (electrical):  

Output (light intensity): radiant flux*  
* Like lumens.  But lumens only refer to 'white' (visible) light. 

BATTERIES

This item takes three AAA batteries (supplied). 

BATTERY LIFE

Best alkaline (typically £1.00 to £1.50 per battery*):

- brightest for: 2½ hours  (1 hour at its very brightest then 1½ hours not quite so bright)

- then, over the next ½ hour, it gradually dims, it still "works" but not at its best

- it is still 'lit' for another 3 hours but too dim to be of use

Cheapest (typically 10p to 20p per battery*):

- brightest for: 1 hour (½ hours at its very brightest then ½ hour not quite so bright)

- then, over the next ½ hour it gradually dims, it still "works" but not at its best

- it is still 'lit' for another 4 hours but too dim to be of use

Further information

All about UV light:

• what it is (and fascinating facts)
• different types (and their applications)
• general examples of items lit by UV light

Photos of what you will see with this (and other) UV lights:

• Paper (banknotes, UV Security marking)
• Uranium glass
• Porcelain repairs