condition	mean	min	max
4 h after light	7.40789	7.214739999999999	7.56987
8 h after light	7.335893333333334	7.0019100000000005	7.50387
12 h after light	7.07435	6.823919999999999	7.2374600000000004
4 h after dark	7.088160000000001	6.585660000000001	7.457210000000001
8 h after dark	7.1036166666666665	6.8586100000000005	7.28625
12 h after dark	7.078126666666666	6.832669999999999	7.39877