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  2. Ceiling fan - Wikipedia

    en.wikipedia.org/wiki/Ceiling_fan

    The earliest stack-motor fan was the Emerson, which was an earlier version of the model that was later called "Heat-Fan", a utilitarian fan with a dropped metal flywheel and blades made of fiberglass and later moulded plastic depending on the model. This fan was produced in numerous different forms from 1962 through 2005 and, while targeted at ...

  3. Lighting - Wikipedia

    en.wikipedia.org/wiki/Lighting

    For example, a 60 W incandescent light bulb produces about the same amount of light as a 13 W compact fluorescent lamp. Each of these technologies has a different efficacy in converting electrical energy to visible light. Visible light output is typically measured in lumens. This unit only quantifies the visible radiation, and excludes ...

  4. Holiday lighting technology - Wikipedia

    en.wikipedia.org/wiki/Holiday_lighting_technology

    All miniature bulbs, including some LED sets, have a wedge base, though their designs are inconsistent with one another, making it somewhat difficult for the average consumer to change bulbs. To replace a bulb, the plastic base of the bulb must usually be changed by straightening the two wires and pulling the glass part out. Most replacement ...

  5. Energy conversion efficiency - Wikipedia

    en.wikipedia.org/wiki/Energy_conversion_efficiency

    The energy efficiency of a process involving chemical change may be expressed relative to these theoretical minima or maxima.The difference between the change of enthalpy and the change of Gibbs energy of a chemical transformation at a particular temperature indicates the heat input required or the heat removal (cooling) required to maintain ...

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  7. Halogen lamp - Wikipedia

    en.wikipedia.org/wiki/Halogen_lamp

    The length (sometimes also referred to as "height") of any two-ended cylindrical bulb must be specified separately from its form factor code, usually in millimeters, as must the lamp's voltage and wattage— hence, T3 120 V 150 W 118 mm means a double-ended tube-shaped bulb with a diameter of 9.5 mm (3 ⁄ 8 in) that operates at 120 V and is ...

  8. Damar Hamlin's life was saved by an AED. Here are 5 things ...

    www.aol.com/lifestyle/damar-hamlins-life-saved...

    Nearly two years ago, NFL fans watched in horror as Buffalo Bills safety Damar Hamlin collapsed on the field after experiencing a sudden cardiac arrest (SCA) midgame. But the now-26-year-old ...

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