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

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

   With an estimated brightness of 4500 lumens and a beam distance of 260 meters, it’s a perfect flashlight for camping and other outdoor activities in remote places that get very dark at night.

3. Solar-powered flashlight - Wikipedia

   en.wikipedia.org/wiki/Solar-powered_flashlight

   A solar flashlight with built-in radio. Solar powered flashlights (American English) or solar powered torches (British English) are flashlights powered by solar energy stored in rechargeable batteries. Most of these flashlights use light-emitting diodes lamps [1] [2] since they have lower energy consumption compared to incandescent light bulbs. [3]

4. Flashlight - Wikipedia

   en.wikipedia.org/wiki/Flashlight

   Flashlights are used as a light source outdoors, in places without permanently installed lighting, during power outages, or when a portable light source is needed. In addition to the general-purpose, hand-held flashlight, many forms have been adapted for special uses.

5. IP code - Wikipedia

   en.wikipedia.org/wiki/IP_Code

   IP65 touchscreen display IP65 LED lamp. The IP code or ingress protection code indicates how well a device is protected against water and dust. It is defined by the International Electrotechnical Commission (IEC) under the international standard IEC 60529 [1] which classifies and provides a guideline to the degree of protection provided by mechanical casings and electrical enclosures against ...

6. The 8 Best Waterproof Bluetooth Speakers For The Beach and ...

   www.aol.com/8-best-waterproof-bluetooth-speakers...

   The Best Waterproof Bluetooth Speakers. Best Overall: JBL Flip 5. Best Budget: Anker Soundcore 3. Best for the Beach: DOSS Waterproof. Best Rugged: AltecLansing LifeJacket 2. Best Sound Quality ...

7. 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 ...