condition	mean	min	max
4 h after light	7.472370000000001	7.331230000000001	7.630780000000001
8 h after light	7.4797199999999995	7.3822399999999995	7.60745
12 h after light	7.433646666666667	7.34351	7.557580000000001
4 h after dark	7.497786666666666	7.412089999999999	7.57424
8 h after dark	7.575276666666666	7.4268	7.737310000000001
12 h after dark	7.362403333333334	7.20142	7.588010000000001