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  2. GU24 lamp fitting - Wikipedia

    en.wikipedia.org/wiki/GU24_lamp_fitting

    The design was initiated by the U.S. EPA and the Lighting Research Center in 2004, in order to facilitate the deployment of compact fluorescent light bulbs with replaceable ballasts. [1] The GU24 fitting is compliant with a 2008 ruling by the California Energy Commission under Title 24 (California Building Standards Code) to require high ...

  3. Fluorescent-lamp formats - Wikipedia

    en.wikipedia.org/wiki/Fluorescent-lamp_formats

    One of the first diameters of fluorescent lamps, with the 15W T8 and 30W T8 having been introduced in 1938. [3] The European energy-saving krypton T8 lamps were introduced by Thorn EMI during the 1970s. [4] The North American energy-saving argon T8 lamps weren't introduced until the 1980s. [5] T9 T29 1 + 1 ⁄ 8: 28.6 G10q quad-pin; G13 bi-pin

  4. 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.

  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. 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. Compact fluorescent lamp - Wikipedia

    en.wikipedia.org/wiki/Compact_fluorescent_lamp

    Philips Lighting ceased research on compact fluorescents in 2008 and began devoting the bulk of its research and development budget to solid-state lighting such as LED lighting. [17] The rise of LED lighting, however, significantly affected CFL sales and production. As a result of decreasing cost and better features, customers increasingly ...

  8. Light-emitting diode - Wikipedia

    en.wikipedia.org/wiki/Light-emitting_diode

    Very small (1.6×1.6×0.35 mm) red, green, and blue surface mount miniature LED package with gold wire bonding details. These are mostly single-die LEDs used as indicators, and they come in various sizes from 1.8 mm to 10 mm, through-hole and surface mount packages. [47] Typical current ratings range from around 1 mA to above 20 mA.

  9. Fluorescent lamp - Wikipedia

    en.wikipedia.org/wiki/Fluorescent_lamp

    A fluorescent lamp, or fluorescent tube, is a low-pressure mercury-vapor gas-discharge lamp that uses fluorescence to produce visible light. An electric current in the gas excites mercury vapor, to produce ultraviolet and make a phosphor coating in the lamp glow.