condition	mean	min	max
4 h after light	7.142506666666667	6.9637199999999995	7.32194
8 h after light	7.23705	7.07262	7.43411
12 h after light	7.264883333333334	7.07845	7.444189999999999
4 h after dark	7.192276666666666	6.952389999999999	7.44867
8 h after dark	7.1391333333333336	6.942260000000001	7.395560000000001
12 h after dark	6.84167	6.587619999999999	7.03268