condition mean min max 4 h after light 3.852735 2.44382 5.26165 8 h after light 4.16663 4.08158 4.25168 12 h after light 4.088405 3.96734 4.20947 4 h after dark 7.158495 5.89337 8.42362 8 h after dark 6.595314999999999 6.25216 6.93847 12 h after dark 4.891995 4.39471 5.38928