condition	mean	min	max
4 h after light	6.869610000000001	6.801260000000001	6.98245
8 h after light	6.937243333333333	6.875319999999999	6.997669999999999
12 h after light	7.04798	6.98411	7.115469999999999
4 h after dark	6.91805	6.874	6.94225
8 h after dark	6.910806666666667	6.75913	7.1405
12 h after dark	6.86105	6.81756	6.88532