What are you talking about? People exploring nature at night have been using red lights for decades. It's standard equipment. There's no mystery around the rea

What are you talking about? People exploring nature at night have been using red lights for decades. It's standard equipment. There's no mystery around the reason to use red light either. Nocturnal animals, especially mammals, have far more rods than cones in their eyes. This means they are much more sensitive to brightness than they are to color. Red light in practice is far less bright than white light for the same input energy (a bit more complicated than this) and for quite a few animals they may not see it at all or very poorly. None of this is theorizing, the effect can be readily seen in practice.