condition mean min max 4 h after light 15.6189735 15.032737 16.20521 8 h after light 11.958563 11.383135 12.533991 12 h after light 13.067156 12.672703 13.461609 4 h after dark 11.305201 11.204424 11.405978 8 h after dark 11.6050725 10.369087 12.841058 12 h after dark 14.922629 14.922629 14.922629