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  2. Compact fluorescent lamp - Wikipedia

    en.wikipedia.org/wiki/Compact_fluorescent_lamp

    Because the current is heavily distorted, the power factor of this lamp is only 0.61. The lamp takes 29 watts, but 39 volt-amperes due to this distortion. The input stage of a CFL is a rectifier, which presents a non-linear load to the power supply and introduces harmonic distortion on the current drawn from the supply.

  3. Aperture - Wikipedia

    en.wikipedia.org/wiki/Aperture

    The specifications for a given lens typically include the maximum and minimum aperture (opening) sizes, for example, f /0.95 – f /22. In this case, f /0.95 is currently the maximum aperture (the widest opening on a full-frame format for practical use [8]), and f /22 is the minimum aperture (the smallest opening). The maximum aperture tends to ...

  4. Peace River, Alberta - Wikipedia

    en.wikipedia.org/wiki/Peace_River,_Alberta

    Citadel Park Area Structure Plan for example is on a 0.14 km 2 (0.054 sq mi) parcel of land with a projection to accommodate 1600 persons, [42] for a density of 11,510.80/km 2 (29,812.8/sq mi). Due to the topographic constraints of the valley as well as the need to protect the natural areas and agricultural lands, the town is committed to ...