condition	mean	min	max
4 h after light	7.3948599999999995	7.0129600000000005	7.699139999999999
8 h after light	7.7531799999999995	7.18235	8.33775
12 h after light	7.352923333333334	6.512230000000001	8.03351
4 h after dark	7.706783333333333	7.1867	8.29916
8 h after dark	7.562763333333334	6.71248	8.37228
12 h after dark	7.324226666666667	6.651510000000001	7.77395