Summary

By far the most brightest (to the human eye) of all. An amazing 100 LED lights. And because it takes so many batteries, it keeps going for quite a long time. 

Takes six AA batteries (included). 

 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: total length 190mm, 7½ inches the head 25mm, 1 inch).  Width of handle  35mm, 1¼ inches (head is 75mm, 3 inches dia.)

Weight including battery: 185g

Light source: 100 LEDs.

Wavelength: 390 - 395nm

Output: unknown

Batteries

Takes six AA batteries. 

BATTERY LIFE

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

- brightest for 5 hours (2hrs at its very brightest then 3hrs not quite so bright)

- then, over the next 3 hours, it gradually dims, it still "works" but not at its best

- it is still 'lit' for another 12  hours but too dim to be of use

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

- brightest for:  2 hours (1hr at its very brightest then 1hr 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 8 hours but too dim to be of use

* 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