>>2855950nah red light doesn't scatter or dissipate as quickly in the atmosphere or fog as shorter wavelength light, this is why things like stop lights and railroad crossing indicators etc are red.
you may have noticed other lights being more visible but remember, it's all about luminosity. a more powerful green light will easily outshine and appear brighter than a red light, but if all things are equal the red light is the last one you will still see as it fades into the distance.
