condition	mean	min	max
0 h after light	18.1618	18.1026	18.221
4 h after light	17.0751	15.7378	18.4124
8 h after light	19.915399999999998	17.7814	22.0494
4 h after dark	20.597450000000002	20.3417	20.8532
8 h after dark	18.8461	17.3522	20.34
12 h after dark	19.8062	17.5059	22.1065