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2. Light-emitting diode - Wikipedia

   en.wikipedia.org/wiki/Light-emitting_diode

   Though dual-LED packages exist that contain a different color LED in each direction, it is not expected that any single LED element can emit visible light when reverse-biased. [citation needed] It is not known if any zener diode could exist that emits light only in reverse-bias mode. Uniquely, this type of LED would conduct when connected ...

3. Emergency vehicle equipment - Wikipedia

   en.wikipedia.org/wiki/Emergency_vehicle_equipment

   LED lights - These are more recent developments, using the 'Super Bright' LED technology, and are entering wide use as they are easy to fit (being only a few millimetres wide, rather than several centimetres for most strobes and incandescent lights). This makes them particularly suitable for covert use.

4. Light-emitting diode physics - Wikipedia

   en.wikipedia.org/wiki/Light-emitting_diode_physics

   Since these materials have a high index of refraction, [note 1] design features of the devices such as special optical coatings and die shape are required to efficiently emit light. A LED is a long-lived light source, but certain mechanisms can cause slow loss of efficiency of the device or sudden failure.

5. LED lamp - Wikipedia

   en.wikipedia.org/wiki/LED_lamp

   A 230-volt LED filament lamp, with an E27 base. The filaments are visible as the eight yellow vertical lines. An assortment of LED lamps commercially available in 2010: floodlight fixtures (left), reading light (center), household lamps (center right and bottom), and low-power accent light (right) applications An 80W Chips on board (COB) LED module from an industrial light luminaire, thermally ...

6. Automotive lighting - Wikipedia

   en.wikipedia.org/wiki/Automotive_lighting

   The first car registered to drive on the road with full LED rear lights was Land Rover's LCV 2/3 concept car in the 1990s. [143] At the time, the only light function that was difficult to reproduce was the reverse light, as white LEDs did not yet exist.

7. 20 useful and innovative gadgets to make life easier for ...

   www.aol.com/lifestyle/products-to-make-life...

   Sunbeam 16986 3-in-1 InstaBeam LED Light, pack of 3. More options. ... do feel a lot like aging in reverse, like needing help getting dressed, struggling to open jars and cans, and being a little ...