condition	mean	min	max
4 h after light	7.635303333333333	7.38294	7.8863199999999996
8 h after light	7.659456666666666	7.3894	7.8902
12 h after light	7.421713333333334	7.272660000000001	7.67077
4 h after dark	7.315096666666666	7.086110000000001	7.53759
8 h after dark	7.5315900000000005	7.28379	7.74547
12 h after dark	7.44656	7.2726	7.74675