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2. Emergency light - Wikipedia

   en.wikipedia.org/wiki/Emergency_light

   An emergency light is a battery-backed lighting device that switches on automatically when a building experiences a power outage. In the United States, emergency lights are standard in new commercial and high occupancy residential buildings, such as college dormitories , apartments , and hotels .

3. Solar lamp - Wikipedia

   en.wikipedia.org/wiki/Solar_lamp

   A garden solar lamp A child in Zambia studying by the light of a lamp charged by solar power during the day. A solar lamp, also known as a solar light or solar lantern, is a lighting system composed of an LED lamp, solar panels, battery, charge controller and there may also be an inverter.

4. Solar-powered flashlight - Wikipedia

   en.wikipedia.org/wiki/Solar-powered_flashlight

   Solar powered lights need not be manually recharged as in the case of conventional battery operated flashlights. [3] Pollution from discarded batteries used in normal flashlights is eliminated. [4] Solar powered flashlights can be used in remote locations where it is impossible to find any source of electricity except for solar power. [4]

5. Flashlight - Wikipedia

   en.wikipedia.org/wiki/Flashlight

   Miniature LED flashlight on a key chain, powered by lithium primary coin batteries. Light output from LED flashlights varies even more widely than for incandescent lights. "Keychain" type lamps operating on button batteries, or lights using a single 5 mm LED, may only produce a few lumens. Even a small LED flashlight operating on an AA cell ...

6. 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.

7. LED circuit - Wikipedia

   en.wikipedia.org/wiki/LED_circuit

   Simple LED (Light Emitting Diode) circuit diagram. In electronics, an LED circuit or LED driver is an electrical circuit used to power a light-emitting diode (LED). The circuit must provide sufficient current to light the LED at the required brightness, but must limit the current to prevent damaging the LED.