condition mean min max 4 h after light 8.818106 8.818106 8.818106 8 h after light 9.65313 8.742193 10.564067 12 h after light 8.629024 7.776321 9.481727 4 h after dark 7.9743995000000005 7.71593 8.232869 8 h after dark 9.0465845 8.45627 9.636899 12 h after dark 9.439174 9.439174 9.439174