condition	mean	min	max
0 h after light	17.6774	17.0638	18.291
4 h after light	21.19855	20.9644	21.4327
8 h after light	18.756700000000002	18.6616	18.8518
4 h after dark	15.750250000000001	15.3817	16.1188
8 h after dark	18.87885	18.2797	19.478
12 h after dark	16.4903	15.97	17.0106