condition mean min max 4 h after light 16.52225 15.4848 17.5597 8 h after light 20.279449999999997 18.9549 21.604 12 h after light 24.584049999999998 24.5608 24.6073 4 h after dark 33.2743 32.041 34.5076 8 h after dark 39.03805 38.3049 39.7712 12 h after dark 30.1919 29.3316 31.0522