Gen 6:16
“Light shalt thou make to the ark, and in a cubit from above shalt thou finish it.” As the meaning light for צהר is established by the word צהרים, “double-light” or mid-day, the passage can only signify that a hole or opening for light and air was to be so constructed as to reach within a cubit of the edge of the roof. A window only a cubit square could not possibly be intended; for צהר is not synonymous with חלּון (Gen 8:6), but signifies, generally, a space for light, or by which light could be admitted into the ark, and in which the window, or lattice for opening and shutting, could be fixed; though we can form no distinct idea of what the arrangement was. The door he was to place in the side; and to make “lower, second, and third (sc., cells),” i.e., three distinct stories.