There are more similarities between Noah’s ark and the Jaredite barges than one might think. Both had to be built to withstand torrential rains and tidal waves. Therefore, they were both built “tight,” in other words, completely sealed when the hatch was closed. For the Jaredites, we know that this design meant that extraordinary means would be needed to provide light. Well then, what did Noah and family do in order to see when they were sealed up in their “tight” ark? By rabbinical and ancient Oriental tradition, they also were given lighted stones to illuminate the ark.
Hugh Nibley
“Truly remarkable is the statement in Ether that the submarine nature of Jared‘s ships made them ’like unto the ark of Noah,’ since that aspect of the ark, perhaps its most characteristic, is not specifically mentioned in the Bible, and has led to great confusion among Bible illustrators, ancient, medieval, and modern…They lead us directly to the most puzzling problem of all-that of the illumination of the ark, for while the window is called a zohar (more properly tsohar), i.e., shiner or illuminator…in a boat equipped to go under water other sources for both [light and ventilation] would have to be found, and it is in the lighting department that the Jewish sources are most specific. For the Rabbis do not settle for the zohar-the lighter of the Ark-as being simply a window: for some of them it was rather a miraculous light-giving stone…Rabbi Akiba ben Kahmana, for example, says it was a skylight, while Rabbi Levi said it was a precious stone. He quotes R. Phineas as saying that ’during the whole twelve months that Noah was in the Ark he did not require the light of the sun by day or the moon by night, but he had a polished gem which he hung up; when it was dim he knew that it was day, and when it shone he knew it was night.’” (A Book of Mormon Treasury, p. 140)
Hugh Nibley
"The oldest accounts of the ark of Noah, the Sumerian ones, describe it as a ’magur boat,’ peaked at the ends, completely covered but for a door, without sails, and completely covered by the waters from time to time, as men and animals rode safe within. But the remarkable thing about Jared’s boats was their illumination by stones which shone in the dark because they had been touched by the finger of the Lord (Ether 3:6, 6:3).
"The Rabbis tell of a mysterious Zohar that illuminated the ark, but for further instruction we must go to much older sources: the Pyrophilus is traced back to the Jalakanta stone of India, which shines in the dark and enables its owner to pass unharmed beneath the waters; this in turn has been traced back through classical and Oriental sources to the Gilgamesh Epic, where Alexander’s wonderful Pyrophilus stone turns up as the Plant of Life in the possession of the Babylonian Noah.
“A large number of ancient traditions, first brought together in the present century, justify one in assuming some sort of legendary shining stones in the ark of Noah. Whether or not there is any historical reality behind it, the fact is that we now know, from sources completely inaccessible to the world of Joseph Smith, that such a tradition actually did exist in very ancient times. It is nothing to laugh at after all.” (The Prophetic Book of Mormon, p. 244)