condition	mean	min	max
4 h after light	7.83149	7.55802	8.03068
8 h after light	8.110556666666668	7.935860000000001	8.27619
12 h after light	8.216973333333334	8.00047	8.34027
4 h after dark	8.064843333333334	7.8407	8.25375
8 h after dark	8.00489	7.841819999999999	8.23949
12 h after dark	7.73939	7.42392	7.91063