condition mean min max 4 h after light 12.932016 12.381804 13.482228 8 h after light 12.435234 11.867536 13.002932 12 h after light 15.265947 14.59929 15.932604 4 h after dark 13.5374655 13.044784 14.030147 8 h after dark 13.206031 13.182232 13.22983 12 h after dark 12.371394 12.371394 12.371394