condition mean min max 0 h after light 8.77266 8.01484 9.53048 2 h after light 9.89804 8.88068 10.9154 4 h after light 13.2166 12.7744 13.6588 8 h after light 11.36515 10.7658 11.9645 12 h after light 17.2965 16.8625 17.7305 2 h after dark 15.6433 14.3995 16.8871 4 h after dark 15.2582 13.7955 16.7209 8 h after dark 13.69745 12.9625 14.4324 12 h after dark 11.3558 10.2889 12.4227