condition	mean	min	max
4 h after light	7.440713333333333	7.26054	7.5551699999999995
8 h after light	7.496216666666666	7.23349	7.6851899999999995
12 h after light	7.855770000000001	7.61563	8.0572
4 h after dark	7.806516666666667	7.67236	7.964810000000001
8 h after dark	7.9034466666666665	7.72927	8.016119999999999
12 h after dark	7.70081	7.629569999999999	7.7813300000000005