Summary

The most powerful for its size, fits easily into a pocket (it even has a clip, keep it in your top pocket). If you work at fairs and markets, centres and galleries, this is the one to keep with you at all times.  Really serious dealers should keep one of these in their pocket and a large (even more powerful) one in the shop. 

Takes one AA battery.

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

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

Technical

Size: 95mm long X 18mm dia,  (3¾ X ¾ inches)

Weight including battery: 55g

Light source: LED chip, Korean

Wavelength: 365nm

Filter: fitted with a filter to improve ultra violet transmission

Output (electrical): 3W

Output (light intensity): radiant flux* 700-900mW
* Like lumens.  But lumens only refer to 'white' (visible) light. 

BATTERIES

Takes four AAA batteries (supplied).  

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

- brightest for 2 hours (1 hour at its very brightest then 1 hour not quite so bright)

- then, over the next 2 hours, it gradually dims, it still "works" but not at its best

- it is still 'lit' for another 1 hour but too dim to be of use

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

- brightest for: 40mns (20 minutes at its very brightest then 20 minutes not quite so bright)

- then, over the next 1 hour, it dims and dies. 

* This is just an example of the quality of battery, standard alkaline batteries are supplied with this item.

Further information

:

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

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

• Paper (banknote, stamp, security marking)
• Uranium glass
• Porcelain repair detection