condition	mean	min	max
4 h after light	15.391905999999999	13.993125	16.790687
8 h after light	16.962557999999998	14.675332	19.249784
12 h after light	22.167748	18.556413	25.779083
4 h after dark	18.939719	18.833984	19.045454
8 h after dark	22.354882	21.1848	23.524964
12 h after dark	20.037434	20.037434	20.037434