phosphorescence

noun

1. (countable, uncountable)The emission of light without any perceptible heat; the quality of being phosphorescent.

   “Mr. Nott proceeded to say that "since the discovery of Photography, there is, perhaps, no branch of electrical physics more interest­ing than that which comprehends the pheno­mena of phosphorescence."”

   “We saw a round red sun rise over the City, paint the glassy towers with phosphorescence and, as it brightened and lost its shape, sprinkle across the sky feathers of pink and lilac.”