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street light


natural light


ambient light








electromagnetic radiation


lighting process






Twilight Experts

The following experts are available as twilight consultants and twilight expert witnesses.  ORC experts are peer-recommended authorities who have been carefully selected and rigorously screened.
    Definition:  Twilight - The three periods of scientifically defined conditions that are collectively named twilight (civil twilight, nautical twilight, and astronomical twilight). This includes the position of the sun below the horizon and the level of natural Light available during each period. "Twilight" can also refer to the soft light in the sky somewhat before sunrise and somewhat after sunset.

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Expert in Calculation of Celestial Events and Issues of Natural Lighting
Expert can perform the necessary calculations to determine the times of moonrise and moonset, moon phase or lunar phases (waxing moon, waning moon, first quarter moon, last quarter moon, full moon, new moon), percent of the moon's surface ... See full profile

Maryland (MD), USA

Expert in the Intersection of Media and Technology for Content Distribution
Expert is an Emmy Award winning television producer with credits including CBS Sports Spectacular, "The Twilight Zone" and the award winning documentary series Reaching for the Skies. These were created and aired during his 15 year tenure at CBS. See full profile

New York (NY), USA

Expert in Cosmetic Surgery: Hair Transplants, Laser Surgery, Facial Plastic, Liposuction
Expert completed her internship in medicine at the Army Medical Center in 1980 and her residency in dermatology at St. Jude in 1989. She also completed a post-graduate fellowship in cosmetic surgery in 1996 at a private Plastic Surgery Clinic. See full profile

Texas (TX), USA


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