Red light doesn't overlap as much with the sensitivity of the rod cells in our eyes which are responsible for night vision (see https://commons.m.wikimedia.org/

Red light doesn't overlap as much with the sensitivity of the rod cells in our eyes which are responsible for night vision (see https://commons.m.wikimedia.org/wiki/File:1416_Color_Sensitivity.svg https://commons.m.wikimedia.org/wiki/File:1416_Color_Sensiti...)