Dont they have profiles already on which type of buildings (hence structural materials) are typically found in cities, and sections (CBD, resort, residential etc). Furthermore, don’t they have profiles of different cities in the world. Seems to me they have enough data to extrapolate the type of sunlight/ambient light one would expect based in what the Satellite data is telling them.
I dont want to fly over Miami or Honolulu with the same assumptions as New York or Las Vegas. The density and heights of buildings seem to be the critical factor to prescribe lighting adjustments as seen from a flyover.