condition	mean	min	max
4 h after light	7.613676666666667	7.51832	7.69413
8 h after light	7.66723	7.62745	7.73175
12 h after light	7.511010000000001	7.45887	7.5618300000000005
4 h after dark	7.370733333333333	7.333819999999999	7.405360000000001
8 h after dark	7.439796666666666	7.35284	7.5272
12 h after dark	7.46011	7.3116	7.6991