condition mean min max 4 h after light 1.4665645 0.606889 2.32624 8 h after light 1.080025 1.02859 1.13146 12 h after light 1.267715 1.25894 1.27649 4 h after dark 0.89827 0.677905 1.29178 8 h after dark 1.13125 1.04278 1.21055 12 h after dark 1.1914 1.04591 1.3544