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2. Light-emitting diode - Wikipedia

   en.wikipedia.org/wiki/Light-emitting_diode

   One-color light is well suited for traffic lights and signals, exit signs, emergency vehicle lighting, ships' navigation lights, and LED-based Christmas lights Because of their long life, fast switching times, and visibility in broad daylight due to their high output and focus, LEDs have been used in automotive brake lights and turn signals.

3. LED circuit - Wikipedia

   en.wikipedia.org/wiki/LED_circuit

   Sub-mA indicators may be made by driving ultra-bright LEDs at very low current. Efficiency tends to reduce at low currents, [3] but indicators running on 100 μA are still practical. In coin cell powered keyring-type LED lights, the resistance of the cell itself is usually the only current limiting device.

4. 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 ...

5. Bright indicator lights ruining your sleep? You’re not alone ...

   www.aol.com/bright-indicator-lights-ruining...

   Those bright indicators are often LED lights. LED lighting is an energy-efficient option for manufacturing indicator lights. The light has a long lifespan and doesn’t generate excess heat ...

6. Light-emitting diode physics - Wikipedia

   en.wikipedia.org/wiki/Light-emitting_diode_physics

   A LED is a long-lived light source, but certain mechanisms can cause slow loss of efficiency of the device or sudden failure. The wavelength of the light emitted is a function of the band gap of the semiconductor material used; materials such as gallium arsenide , and others , with various trace doping elements , are used to produce different ...

7. Indicator lamp - Wikipedia

   en.wikipedia.org/wiki/Indicator_lamp

   An indicator lamp (or indicator light) is an illuminated device that is intended to visually convey a single status to the user of a piece of equipment. Indicator lamp may refer to: Check engine light, a tell-tale warning light in automobiles; Tell-tale (automotive), a more generic class of indicators