As mentioned previously the light and dark aspects of the map page, at least to me, where simply there to simulate creases in your map chart. I've found no correlation between these shaded areas and time of day. One thing I have noticed however is the time of dawn and dusk once I get near japan whereby dawn can be close to 10am and dusk damn near midnight in some cases!!
I know there's DST etc and I don't have any real life exposure to that end of the world but the dawn and dusk timings seem a bit strange sometimes.
Ref red lights, we still use red filters on flashlights at night to maintain night vision "in the bush". There's a good episode of Mythbusters which investigates this type of thing, it was their "pirate myths" episode. Supposedly one myth states that the famous pirate eyepatch was not from wounds but a method of keeping one eye ready for night vision by keeping it covered!!
