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  2. Twilight - Wikipedia

    en.wikipedia.org/wiki/Twilight

    Observers within 63°26' of the Equator can view twilight twice each day on every date between the month of the autumnal equinox and the month of vernal equinox between astronomical dawn, nautical dawn, or civil dawn, and sunrise as well as between sunset and civil dusk, nautical dusk, or astronomical dusk, i.e., from September 1 to March 31 of ...

  3. Lithonia (song) - Wikipedia

    en.wikipedia.org/wiki/Lithonia_(song)

    "Lithonia" is a song by American singer Childish Gambino. It was released as the lead single from his fifth studio album Bando Stone & the New World on July 2, 2024. [ 3 ] It is a guitar-driven rock song named after Lithonia, Georgia .

  4. Crepuscular rays - Wikipedia

    en.wikipedia.org/wiki/Crepuscular_rays

    Crepuscular rays are noticeable when the contrast between light and dark is most obvious. Crepuscular comes from the Latin word crepusculum, meaning "twilight". [2] Crepuscular rays usually appear orange because the path through the atmosphere at dawn and dusk passes through up to 40 times as much air as rays from a high Sun at noon.

  5. Holophane - Wikipedia

    en.wikipedia.org/wiki/Holophane

    Vintage industrial Holophane pendant light. Holophane, a division of Acuity Brands, is a manufacturer of lighting-related products founded in 1898 in London, England. The company is a UK-based (Milton Keynes, England) and US manufacturer (based in Newark, Ohio) of lighting fixtures for commercial, industrial, outdoor, and emergency applications.

  6. 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.

  7. Blue hour - Wikipedia

    en.wikipedia.org/wiki/Blue_hour

    Blue hour at the Old Cathedral of the Holy Name of Jesus, Bragança in Portugal. The blue hour (from French l'heure bleue; [1] [a] pronounced [lœʁ blø]) is the period of twilight (in the morning or evening, around the nautical stage) when the Sun is at a significant depth below the horizon.

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