To have new light, you are assuming that you have some light to begin with, don't you?
Charles Taze Russell addresses this very topic when he wrote "Any knowledge coming from God must be like it's author. A new view of truth could never contradict a former truth. 'New light' never extinguishes older 'light', but adds to it. If you were lighting up a building containing seven gas jets you would not extinguish one every time you lighted another, but would add one light to another and they would be in harmony and thus give increase of light: So it is with the light of truth; the true increase is by adding to, not by substituting one for another" Watchtower reprints, 188 [Zion's Watch Tower, February 1881]
"the men of Sodom will be resurrected" [watchtower reprints, 7-8 (Zion's Watch Tower, July 1879, 7-8)]
"the men of Sodom will not be resurrected" [The Watchtower, 1 June 1952, 338.]
"the men of Sodom will be resurrected" [The Watchtower, 1 August 1965, 479]
"the men of Sodom will not be resurrected" [ The Watchtower, 1 June 1988, 30-31]
someone's playing wiith the lightswitch again..
dc