Mbh 7.169.1d

The blazing lamps also, placed on cars and elephants and steeds, seemed, O king, large meteors falling from the firmament. That night, O chief of the Bharatas, lightened up by those lamps looked like day, O king, on the field of battle. As the sun, encountering the thick gloom, destroys it completely, even so the thick gloom of the battle was destroyed by those blazing lamps. Indeed, the welkin, the earth, the cardinal and the subsidiary points of the compass, enveloped by dust and darkness, became once more illuminated by that light. The splendour of weapons and coats of mail, and of the jewels of illustrious heroes, became overshadowed, by the light of those blazing lamps. During the progress of that fierce battle at night, none of the combatants, O Bharata, could know the warriors of his own side. Sire, O chief of the Bharatas, slew son, and son, from ignorance, slew sire, and friend slew friend. And relatives slew relatives, and maternal uncles slew sisters’ sons, and warriors slew warriors of their own side, and foes slew their own men, in that battle, O Bharata. In that dreadful nocturnal encounter, O king, all fought furiously, ceasing to have any regard for one another.’”