condition mean min max 4 h after light 1153.735 1113.61 1193.86 8 h after light 285.025 283.29 286.76 12 h after light 40.40025 36.4204 44.3801 4 h after dark 30.82025 29.3319 32.3086 8 h after dark 21.0799 20.8254 21.3344 12 h after dark 115.475 105.497 125.453