condition mean min max 4 h after light 6.213335000000001 5.71102 6.71565 8 h after light 7.930315 7.20239 8.65824 12 h after light 7.406385 6.27099 8.54178 4 h after dark 9.0786 8.62554 9.54089 8 h after dark 8.929683333333333 6.71697 11.3658 12 h after dark 7.445266666666667 5.16996 8.82928