condition	mean	min	max
4 h after light	17.540432000000003	16.281939	18.798925
8 h after light	19.7104005	19.412165	20.008636
12 h after light	18.548549	18.013717	19.083381
4 h after dark	21.137407500000002	21.07602	21.198795
8 h after dark	19.2041265	19.083381	19.324872
12 h after dark	19.966779	19.966779	19.966779