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  2. Device for Connection of Luminaires - Wikipedia

    en.wikipedia.org/wiki/Device_for_Connection_of...

    Device for Connection of Luminaires (DCL) is a European standard for ceiling light fixtures introduced in 2005 and refined in 2009. It uses 6 ampere. DCL must carry the CE marking as per the Low Voltage Directive. DCL is only allowed to be installed with ground. Example of DCL socket.

  3. Photoresistor - Wikipedia

    en.wikipedia.org/wiki/Photoresistor

    Three photoresistors with scale in mm Large CdS photocell from a street light. A photoresistor is less light-sensitive than a photodiode or a phototransistor.The latter two components are true semiconductor devices, while a photoresistor is a passive component that does not have a PN-junction.

  4. Resistive opto-isolator - Wikipedia

    en.wikipedia.org/wiki/Resistive_opto-isolator

    Opto-isolator VTL2C1 with LED input and photoresistor output. Resistive opto-isolator (RO), also called photoresistive opto-isolator, vactrol (after a genericized trademark introduced by Vactec, Inc. in the 1960s), analog opto-isolator [notes 1] or lamp-coupled photocell, [1] is an optoelectronic device consisting of a source and detector of light, which are optically coupled and electrically ...

  5. Knob-and-tube wiring - Wikipedia

    en.wikipedia.org/wiki/Knob-and-tube_wiring

    Other ceramic pieces would typically be used as a junction point between the wiring system proper, and the more flexible cloth-clad wiring found in light fixtures or other permanent, hard-wired devices. When a generic power outlet was desired, the wiring could run directly into the junction box through a tube of protective loom and a ceramic ...

  6. Phototube - Wikipedia

    en.wikipedia.org/wiki/Phototube

    A phototube or photoelectric cell is a type of gas-filled or vacuum tube that is sensitive to light. Such a tube is more correctly called a 'photoemissive cell' to distinguish it from photovoltaic or photoconductive cells. Phototubes were previously more widely used but are now replaced in many applications by solid state photodetectors.

  7. This Cozy Cape Cod Cottage Has "Nooks and Crannies Galore" - AOL

    www.aol.com/lifestyle/cozy-cape-cod-cottage...

    THE SPACE: A 3,200-square-foot, 4-bedroom, 3-bath house with ... Where there wasn’t enough room in the wall to wire and install new lighting, Shadrick sourced plug-in sconces. ... Light fixture ...

  8. Light fixture - Wikipedia

    en.wikipedia.org/wiki/Light_fixture

    A light fixture (US English), light fitting (UK English), or luminaire is an electrical lighting device containing one or more light sources, such as lamps, and all the accessory components required for its operation to provide illumination to the environment. [1] All light fixtures have a fixture body and one or more lamps.

  9. Photometry (optics) - Wikipedia

    en.wikipedia.org/wiki/Photometry_(optics)

    A photocell rotates about the lamp in three axes, measuring the output of the lamp from all sides. Lamps and lighting fixtures are tested using goniophotometers and rotating mirror photometers, which keep the photocell stationary at a sufficient distance that the luminaire can be considered a point source. Rotating mirror photometers use a ...

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