It sounds like 1956's The Mole People:
A party of archaeologists discovers the remnants of a mutant five-millennia-old Sumerian civilization living beneath a glacier atop a mountain in Mesopatamia.
which can be seen here or as an episode of Mystery Science Theater 3000 here.
Maybe you saw it as an episode of MST3K in the 90's and remember the time-frame from that. (That's when I first saw it.) Also, it does contain an albino race not mentioned in the title or brief IMDb summary. The albino race was so light sensitive that one of the explorer's flashlight actually hurt them when pointed their way. The explorers with their different skin and flashlight were thought to be gods for part of the movie. There was also an indiginent beautiful servant woman who was not pale, like the rest, and considered a freak to the society.