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kleinbl00 · 3481 days ago · link · · parent · post: Researchers demonstrate the world's first white lasers
Oh, that one's even easier. White light is what we're used to. Red light is what klingons are used to. Bathe a room in white light and you're a human. Bathe it in red light and you're the Predator. The purpose is convenience and integration with our existing lives so "things that don't make your interior designer have an embolism" are de rigueur.