condition	mean	min	max
4 h after light	8.360646666666668	8.24538	8.419960000000001
8 h after light	8.378743333333333	8.172369999999999	8.52472
12 h after light	8.328663333333333	8.22585	8.413160000000001
4 h after dark	8.192183333333334	8.08582	8.34052
8 h after dark	8.1569	7.999910000000001	8.240730000000001
12 h after dark	8.14393	8.08119	8.2543