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  2. Walmart's early Black Friday deals are rivaling Amazon ... - AOL

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    Samsung DU69 4K 65-Inch Smart TV — on sale for ... score this must-have kitchen gadget on sale for $127 at Walmart, while it's $170 ... It features a compact and cozy 43-inch LED 4K display with ...

  3. Here are the best 'As Seen on TV' items under $25 at Walmart

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    Store it in your purse or carry-on — it's about the size of a tube of lipstick. It's great to have on hand at all times and is safe for daily use. This reviewer loved it so much, she bought a ...

  4. 5 of the best early Black Friday TV deals at Walmart to shop ...

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    Bring out more lifelike color, texture and detail to the shows your watch thanks to this TV's 4K 2160 pixel resolution. With built-in Roku Streaming TV, you'll have access to over half a million ...

  5. LED tube - Wikipedia

    en.wikipedia.org/wiki/LED_tube

    LED tubes. LED tube is a type of LED lamp used in fluorescent tube luminaires with G5 and G13 bases to replace traditional fluorescent tubes. [1] As compared to fluorescent tubes, the most important advantages of LED tubes are energy efficiency and long service life. LED tubes are sometimes also referred to as ‘LED fluorescent tubes’.

  6. Electrical ballast - Wikipedia

    en.wikipedia.org/wiki/Electrical_ballast

    An American electronic instant start ballast for powering a variety of American T8 fluorescent lamps. Variety of ballasts for fluorescent and other discharge lamps. An electrical ballast is a device placed in series with a load to limit the amount of current in an electrical circuit.

  7. Fluorescent-lamp formats - Wikipedia

    en.wikipedia.org/wiki/Fluorescent-lamp_formats

    In the 1970s, Thorn Lighting introduced an energy-saving 8 ft retrofit tube in Europe. Designed to run on the existing 125 W (240 V) series ballast but with a different gas fill and operating voltage, the tube operated at only 100 W. Increased efficiency meant that the tube produced only 9% lumen reduction for a 20% power reduction. [7]