condition mean min max 4 h after light 38.603 35.4992 41.7068 8 h after light 30.00685 27.6281 32.3856 12 h after light 40.55995 39.8506 41.2693 4 h after dark 44.87935 42.9273 46.8314 8 h after dark 49.1174 48.1664 50.0684 12 h after dark 48.830799999999996 48.5199 49.1417