lighting

noun

equipment to provide light
deliberate use of light for effect
act of setting fire

Wiktionary

Pronunciation: /ˈlaɪtɪŋ/ / [-ɾɪŋ]

noun

Etymology: Etymology tree Proto-Indo-European *lewk-der. Proto-Germanic *leuhtaz Proto-West Germanic *leuht Old English lēoht Middle English light English light English -ing English lighting From light + -ing.

The equipment used to provide illumination; the illumination so provided.
“The acetylene gas lighting in the station offices and platforms at Kyle of Lochalsh recently has been replaced by electric lighting.”
“The dawn of the oil age was fairly recent. Although the stuff was used to waterproof boats in the Middle East 6,000 years ago, extracting it in earnest began only in 1859 after an oil strike in Pennsylvania.[…]It was used to make kerosene, the main fuel for artificial lighting after overfishing led to a shortage of whale blubber. Other liquids produced in the refining process, too unstable or smoky for lamplight, were burned or dumped.”
The act of activating such equipment, or of igniting a flame etc.
“We've observed plenty of strikings followed by lightings, so even if we should not say that the strikings cause the lightings, isn't it at least reasonable to predict, and to believe, that the next time we strike a match in similar conditions, it will be followed by a lighting?”
The process of annealing metals.

verb

present participle and gerund of light