Definition of "lumination"

Nor are we to think it strange, if after so great a quantity of luminous vapour had been carried up into the ether, out of the pores of the earty, the cause of its effervescence at length abating, or perhaps the matter consumed, these effluvia should at length subside, and form those two bright luminations which we have described; and, whose edges being turned to us, were capable to emit so much light that we might rea by them. I choose to call them luminations, because, though they were but thin, doubtless they spread horizontally over a large tract of the earth's surface.

1815, Edward Polehampton, “Aurora Borealis and Australis”, in The Gallery of Nature and Art; or, A Tour through Creation and Science. [...] Illustrated with One Hundred Plates, from New Designs, Descriptive of the Wonders of Nature and Art. [...] In Six Volumes, volume IV, London: Printed by R. Wilks, 89, Chancery-Lane; sold by Cradock and Joy, Paternoster-Row; Rodwell, New Bond-Street; Underwood, Fleet-Street; and all other booksellers, section II (Account of Surprising Lights in the Air, March 6, 1716; with an Attempt to Explain Their Principal Phœnomena. By Edmund [i.e., Edmond] Halley, J.V.D. Savilian Professor of Geometry, Oxon, and Secretary to the Royal Society.), page 412

The most delicate test for phosphorus is the distillation of the suspected substance, especially flour paste, with a little sulphuric acid and water. […] Where the aqueous vapors from the flask reach the cooling tube, a lumination is constantly observed in the dark, usually a luminous ring. […] If ether, alcohol or turpentine are present, they will prevent the lumination, which commences as soon as they have passed over.

1856 July, E[ilhard] Mitscherlich, “[Contributions to Toxicology. [Translated from Archiv. d. Pharm. and Buchners N. Repertorium.] by John M. Maisch.] Method to Discover Phosphorus”, in William Procter Jr., editor, The American Journal of Pharmacy, volume XXVIII (Third Series, volume IV), Philadelphia, Pa.: Merrihew & Thompson, printers, Lodge Street, north side Pennsylvania Bank, pages 323–324

Who knows how many forgotten souls had rotted away and eventually died within the walls of this dungeon? Would he be one of them? The only light was the scant lumination that flickered upon the floor cast by a torch far down the hall.

2001, Robert R. Hotchkiss, “In the Palace Dungeon”, in Earth of Fire, Sky of Ice: An Epic Fantasy Adventure (The Shaldrodan Saga; book 1), Lincoln, Neb.: Writers Club Press, iUniverse, page 159

We are confronted with saving our entire Pleistocene legacy, with redeeming creation, beyond big bangs and white dwarfs and any and all apocalypses. We are being offered the only way to understand what a universe is. The real universe, the one that beats in our hearts, that casts its luminations across our dreams …

2008, Richard Grossinger, “Third Cycle”, in The Bardo of Waking Life, Berkeley, Calif.: North Atlantic Books, page 264

It is not atypical for a newly installed LED [light-emitting diode] board to be capable of luminating for 100,000 hours, continuously, in a 24/7 production facility. In the future, these lumination times are expected to increase incrementally.

2008, Jimmy Schaeffler, “What’s Driving Digital Signage?”, in Digital Signage: Software, Networks, Advertising, and Displays: A Primer for Understanding the Business (NAB Executive Technology Briefings), Burlington, Mass., Oxford: Focal Press, page 80