condition mean min max 0 h after light 7.55038 7.31286 7.7879 4 h after light 10.553825 9.15875 11.9489 8 h after light 12.132850000000001 11.9931 12.2726 4 h after dark 15.75085 14.0963 17.4054 8 h after dark 11.69365 11.1889 12.1984 12 h after dark 10.068950000000001 8.5531 11.5848