condition	mean	min	max
0 h after light	17.34075	17.1677	17.5138
4 h after light	19.335900000000002	18.8047	19.8671
8 h after light	16.9729	14.5691	19.3767
4 h after dark	18.913249999999998	13.5017	24.3248
8 h after dark	21.60235	20.948	22.2567
12 h after dark	16.16935	15.0454	17.2933