condition	mean	min	max
4 h after light	6.822003333333333	6.699089999999999	6.94667
8 h after light	6.85004	6.59094	7.0841
12 h after light	6.592106666666667	6.26499	6.7889800000000005
4 h after dark	6.73195	6.51472	6.887810000000001
8 h after dark	6.4449700000000005	6.2677	6.608460000000001
12 h after dark	6.637476666666667	6.62252	6.662660000000001