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2. Need to Work in the Dark? Turn to One of These Editor ... - AOL

   www.aol.com/done-dark-turn-one-rechargeable...

   Best Value: Anker Bolder LC40 Rechargeable Flashlight. Best Tactical: Fenix PD36R Rechargeable Flashlight. Highest Battery Capacity: Yierblue Rechargeable Spotlight. Best for Hands-Free Use ...

3. We Built an Integrating Sphere to Test and Determine the Best ...

   www.aol.com/8-best-flashlights-everyday...

   We tested LED flashlights by measuring their lumens, beam drop-off, and beam pattern—plus their battery life and durability. These eight are worth your money. We Built an Integrating Sphere to ...

4. Forget Your Phone’s Flash; These Are the Best Pocket ... - AOL

   www.aol.com/never-dark-again-best-pocket...

   The Best Pocket Flashlights. Best Overall: Streamlight 66601 Best Value: Hatori Super Small Mini Best Super-Small: Olight I1R 2 Pro Eos Best for a Keychain: Streamlight 73300 Pocket Mate Best for ...

5. Mechanically powered flashlight - Wikipedia

   en.wikipedia.org/.../Mechanically_powered_flashlight

   These flashlights can also be distinguished by the technique used to store the energy: a spring, [1] a flywheel, a battery or a capacitor. Since they are always ready for use, mechanically powered flashlights are often kept as emergency lights in case of power outages or other emergencies. They are also kept at vacation homes, cabins, and other ...

6. Photopolymer - Wikipedia

   en.wikipedia.org/wiki/Photopolymer

   A photopolymer or light-activated resin is a polymer that changes its properties when exposed to light, often in the ultraviolet or visible region of the electromagnetic spectrum. [1] These changes are often manifested structurally, for example hardening of the material occurs as a result of cross-linking when exposed to light.

7. Blacklight - Wikipedia

   en.wikipedia.org/wiki/Blacklight

   Blacklight is commonly used to authenticate oil paintings, antiques and banknotes. It can also differentiate real currency from counterfeit notes because, in many countries, legal banknotes have fluorescent symbols on them that only show under a blacklight. In addition, the paper used for printing money does not contain any of the brightening ...