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  2. Dawn simulation - Wikipedia

    en.wikipedia.org/wiki/Dawn_simulation

    A dawn simulator can be used as an alarm clock. Light enters through the eyelids triggering the body to begin its wake-up cycle, including the release of cortisol, so that by the time the light is at full brightness, sleepers wake up on their own, without the need for an alarm. Most commercial alarm clocks include a "dusk" mode as well for bedtime.

  3. Here’s the truth behind 6 of the most widely circulated ...

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    Aimer explained: “In a commercial aircraft you must have certain types of lights to operate between dawn and dusk. One is position lights – a green and red light on each wing tip and a tail light.

  4. Twilight switch - Wikipedia

    en.wikipedia.org/wiki/Twilight_switch

    (power transistor, thyristor, triac, etc.), which activates the lighting system. Generally, the natural lighting that goes directly to a photoresistor is used, with the effect of a lamp that automatically turns on at dusk and always goes out in the first light of dawn.

  5. Twilight - Wikipedia

    en.wikipedia.org/wiki/Twilight

    [1] [failed verification] At nautical dawn and nautical dusk, the human eye finds it difficult, if not impossible, to discern traces of illumination near the sunset or sunrise point of the horizon (first light after nautical dawn but before civil dawn and nightfall after civil dusk but before nautical dusk). [citation needed]

  6. Sandy Creek Airpark - Wikipedia

    en.wikipedia.org/wiki/Sandy_Creek_Airpark

    This airport has one dusk-to-dawn lighted runway, and a green-white beacon. The facility is used primarily by residents/association members, their tenants and guests, and members of the EAA Chapter 202. Phase I of Sandy Creek Airpark was completed in 1983, followed by Phase II in 1988. Sandy Creek Airpark will soon develop Phase III.

  7. 50 Of The Most Fascinating, Stunning And Dangerous Natural ...

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    Aurora Australis, or the Southern Lights, is a natural light display caused by solar wind particles colliding with Earth’s magnetic field. This creates colorful lights in the sky, typically ...