condition	mean	min	max
4 h after light	7.139	6.96513	7.25652
8 h after light	6.869993333333333	6.81735	6.902769999999999
12 h after light	7.29105	7.03238	7.47543
4 h after dark	7.2504100000000005	6.89157	7.45535
8 h after dark	7.51649	7.41252	7.7017
12 h after dark	7.571646666666666	7.45555	7.63422