UV torch with 41 L.E.D. lights

Summary Good combination of good wavelength and brightness for a low price. Last few, discontinued item.  Takes standard batteries.   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 UV Wavelength: 380nm Size: 140 long X 50mm (widest).  5.5 X 2 inches. LEDs:  41 LED UVs Output: unknown Battery: 4 of AAA-size 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 3 hours, it gradually dims, it still "works" but not at its best - it is still 'lit' for another 10 hours but too dim to be of use Cheapest (typically 10p to 20p per battery*): - brightest for: ¾ hour (¼ hour at its very brightest then ½ hours not quite so bright) - then, over the next 1 hour, it gradually dims, it still "works" but not at its best - it is still 'lit' for another     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 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 (banknote, stamp, security marking) Uranium glass Porcelain repair detection