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  2. Fluorescent-lamp formats - Wikipedia

    en.wikipedia.org/wiki/Fluorescent-lamp_formats

    High-lumen retrofit lamps for 40W T12 lamps in North America. Popular tube diameter in Japan; Circular 32W and 40W T10 lamps (Older versions of the 32W and 40W T9 lamps) T12 T38 1 + 1 ⁄ 2: 38.1 G13 bi-pin; Fa8 single-pin; R17d recessed double contact; One of the first diameters of fluorescent lamps, with the 15W T12 and 20W T12 having been ...

  3. Electrical ballast - Wikipedia

    en.wikipedia.org/wiki/Electrical_ballast

    The top is a rapid start series autoregulator ballast for two 3040 W lamps. The middle is a preheat reactor ballast for a single 3040 W lamp while the bottom ballast is a simple inductor used with a 15 W preheat lamp. An American magnetic ballast for signs in an aluminum sign frame.

  4. Phase-out of incandescent light bulbs - Wikipedia

    en.wikipedia.org/wiki/Phase-out_of_incandescent...

    60 W incandescent light bulb with energy efficiency class E Equivalent 42 W halogen incandescent light bulb with efficiency class C Compact fluorescent lamp LED lamp. Various governments have passed legislation to phase out manufacturing or importation of incandescent light bulbs for general lighting in favor of more energy-efficient alternatives.

  5. Fluorescent lamp - Wikipedia

    en.wikipedia.org/wiki/Fluorescent_lamp

    This type of ballast is common in 220–240V countries (And in North America, up to 30W lamps). Ballasts are rated for the size of lamp and power frequency. In North America, the AC voltage is insufficient to start long fluorescent lamps, so the ballast is often a step-up autotransformer with substantial leakage inductance (to limit current flow).

  6. Today’s NYT ‘Strands’ Hints, Spangram and Answers for ...

    www.aol.com/today-nyt-strands-hints-spangram...

    According to the New York Times, here's exactly how to play Strands: Find theme words to fill the board. Theme words stay highlighted in blue when found.

  7. USA downs rival Canada, wins group at world juniors hockey ...

    www.aol.com/usa-vs-canada-world-juniors...

    Dec. 30. Slovakia 5, Kazakhstan 4 (OT) Latvia 4, Germany 3 (OT) This article originally appeared on USA TODAY: World juniors hockey highlights: USA downs Canada, wins group. Show comments.