condition mean min max 0 h after light 19.76665 15.5221 24.0112 4 h after light 20.6685 20.5972 20.7398 8 h after light 24.08845 23.7108 24.4661 4 h after dark 23.9318 23.7836 24.08 8 h after dark 18.925199999999997 18.5479 19.3025 12 h after dark 18.7813 17.1132 20.4494