lumination

1. (rare) Illumination; specifically, artificial illumination.Examples: "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 earth, 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 read 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."; "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."; "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."Synonyms: brightening, lighting, illuminationcountablerareuncountable