luminous emittance

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noun Optics.

luminous flux emitted per unit area.

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Words nearby luminous emittance

There he claims he saw a luminous object change colors several times then vanish into the night sky.
1980: America’s First Extraterrestrial Election||October 15, 2014|DAILY BEAST
Reviews when the play was at Steppenwolf in Chicago described her as luminous.
Fall Broadway Preview: 'This Is Our Youth,' Bradley Cooper as ‘The Elephant Man,' and More|Janice Kaplan|September 11, 2014|DAILY BEAST
Her luminous face has been preserved forever, and multiplies with every tribute.
The Day the Fairytale Died|Marilyn Johnson|July 12, 2014|DAILY BEAST
However, astronomers have spotted a few luminous black hole pairs, mostly in chaotic galaxies in the early stages of a merger.
Black Hole Pair Caught in Feeding Frenzy|Matthew R. Francis|April 27, 2014|DAILY BEAST

Silverstone will “show you the way to have a luminous, present, ailment-free pregnancy.”
From ‘Clueless’ to Clueless: Alicia Silverstone’s ‘The Kind Mama’|Lizzie Crocker|April 22, 2014|DAILY BEAST
The red glow was so brilliant that the whole river was tinged and made luminous by it.
The Jesuit Relations and Allied Documents, Vol. II: Acadia, 1612-1614|Various
Gwynne's mind seemed to darken until only one luminous point confronted it, the visible tormented soul of his kinsman.
Ancestors|Gertrude Atherton
The glowing heavens, luminous athwart the clouds of fine, suspended sand, laid this ominous hint of dream upon the entire day.
The Wave|Algernon Blackwood
He laughed in his luminous and excited way, and, seizing both her hands, kissed them one after the other.
The Joyous Adventures of Aristide Pujol|William J. Locke
In the black light, luminous fingers suddenly showed themselves.
Hooded Detective, Volume III No. 2, January, 1942|Various