Job 18:5

“Yea, the light of the wicked shall be put out, etc.] Or “nevertheless” f690; notwithstanding all this disregard and inattention to us, and contempt of us, and all the rage, and wrath, and pride, and haughtiness discovered, as if the laws of nature, and stated methods of Providence, must all give way to justify a man in such circumstances as show him to be wicked; this will certainly be his case, his “light shall be put out”; meaning not the light of his eyes, or his corporeal light, which sometimes has been the case of wicked men, as was of the Sodomites, since this, through accident, or old age, is common to good and bad then; but rather moral light, the light of nature, with which every…”

“That (Job 18:4) cannot be. The decree of God is unalterable, the light (prosperity) of the wicked shall at length be put out. his fire--alluding to Arabian hospitality, which prided itself on welcoming the stranger to the fire in the tent, and even lit fires to direct him to it. The ungodly shall be deprived of the means to show hospitality. His dwelling shall be dark and desolate!”

“Yea - Truly; or, behold. Bildad here commences his remarks on the certain destiny of the wicked, and strings together a number of apparently proverbial sayings, showing that calamity in various forms would certainly overtake the wicked. There is nothing particularly new in his argument, though the use of the various images which he employs shows how deep was the conviction of this doctrine at that time, and how extensively it prevailed. The light of the wicked shall be put out - Light here is an emblem of prosperity. The spark of his fire - Hebrew the flame of his fire. There may be an allusion here to the customs of Arabian hospitality. This was, and is, their national glory, and it is…”

“18:5 The light of the wicked will be snuffed out could be a metaphor for a life of confused darkness (Prov 4:19); more likely, it indicates an early death (Prov 13:9; 24:20).”

“the light: Job 20:5; Pro 4:19, Pro 13:9, Pro 20:20, Pro 24:20 spark: Isa 50:11 Job 18:6”