condition	mean	min	max
4 h after light	20.0902195	17.743088	22.437351
8 h after light	19.73587	19.670303	19.801437
12 h after light	17.2453005	15.794114	18.696487
4 h after dark	17.032599	15.341971	18.723227
8 h after dark	21.486898	15.699855	27.273941
12 h after dark	18.723227	18.723227	18.723227