ציטירנדיקער פּירוש אויף איוב 31:26

Light of yeqarot. Clear/bright light as in (Job 31:26) "or the moon walking yaqar (in brightness/splendor).

And it shall come to pass on that day - on the day that he mentioned that there would be the sign, this is the matter, that there will not be light of yeqarot nor of qippa'on, and the interpretation by way of analogy is that the light of day will not be bright, which is the light of yeqarot, as in "the moon walks yaqar (in brightness)" (Job 31:26), and neither [will there be] light of qippa'on, which is frozen and thick, which is like darkness. And the interpretation is that that day will not be neither all like light nor all like darkness, meaning neither comfortable nor troubling, but rather both of them will be in it. And likewise he (Zechariah) says after it (verse 7)"not day and not night." And Jonathan translated, "there will not be light, but rather passing light and ice/thickness/congealment"

illuminate Heb. יָהֵלּוּ. They shall illuminate, and so (Job 29:3), “When his lamp shone,” (בְּהִלּוֹ)” (ibid. 31:26). The light when it shone brightly (יָהֵל).