condition	mean	min	max
4 h after light	7.60457	7.49569	7.72929
8 h after light	7.53689	7.420789999999999	7.62862
12 h after light	7.3478166666666676	7.25778	7.48861
4 h after dark	7.3370999999999995	7.22197	7.502089999999999
8 h after dark	7.478366666666667	7.3811100000000005	7.59294
12 h after dark	7.477813333333334	7.31805	7.6090800000000005