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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...

   The sweet spot for all-day battery life is about 3,000 mAh; rechargeable flashlights with batteries that are 5,000 mAh or more can provide powerful light for days at a time. Power Modes

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. 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.

5. Maglite - Wikipedia

   en.wikipedia.org/wiki/Maglite

   2009: Next Generation Mag-LED Technology: Featuring a new Luxeon Rebel LED and extended battery life. 2010: Maglite XL100: offers a motion-controlled user interface using a built-in accelerometer 2010: Maglite XL50: This is a simpler version of the XL100, featuring three modes that can be activated with consecutive presses of the tailcap switch.

6. Mechanically powered flashlight - Wikipedia

   en.wikipedia.org/.../Mechanically_powered_flashlight

   The best designs use a supercapacitor instead of a rechargeable battery, since these have a longer working life than a battery. This, along with the long-life light-emitting diode which does not burn out like an incandescent bulb, give the flashlight a long lifetime, making it a useful emergency light. A disadvantage of many current models is ...

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 ...