condition mean min max 4 h after light 2.11938 1.95824 2.28052 8 h after light 4.36238 4.19005 4.53471 12 h after light 6.198404999999999 6.0679 6.32891 4 h after dark 4.781373333333333 4.3427 5.32494 8 h after dark 5.360186666666666 4.59472 6.00426 12 h after dark 2.73666 2.59706 2.90036