condition mean min max 4 h after light 3.8643766666666663 3.7654900000000002 3.9356199999999997 8 h after light 3.9094833333333336 3.8713 3.97517 12 h after light 3.85012 3.7778699999999996 3.9309800000000004 4 h after dark 3.9383500000000002 3.8229 4.03399 8 h after dark 3.8531033333333333 3.7784 3.9111 12 h after dark 3.9272599999999995 3.8328599999999997 4.018669999999999