The nighttime scenes in Greta Gerwig’s Little Women deliver the usual, approvable candle-light amber. As they should. That 19th Century timestamp. But Steven Spielberg’s Lincoln, set during the same Civil War era as Louisa May Alcott’s novel, happens in Janusz Kaminskiland — a candle or two, a few gas lamps and a whole lot of milky-gray Kaminski “sunlight” piercing through the windows. It’s the early 1860s as imagined by a headstrong alien.