John Gill Commentary Lamentations 3:2

"He hath led me and caused me to walk in darkness, and not in light." — Lamentations 3:2 (ASV)

He hath led me, and brought [me into] darkness Which often signifies distress, calamity, and affliction, of one sort or another: thus the Jews were brought into the darkness of captivity; Jeremiah to the darkness of a dungeon, to which there may be an allusion; and Christ his antitype was under the hidings of God's face; and at the same time there was darkness all around him, and all over the land; and all this is attributed to God; it being by his appointment, and by his direction and permission:

but not [into] light ; prosperity and joy; the affliction still continuing; though God does in his due time bring his people to the light of comfort, and of his gracious presence, as he did the above persons; see (Psalms 97:11) (112:4) .