condition	mean	min	max
4 h after light	7.546710000000001	7.296710000000001	7.698810000000001
8 h after light	7.662843333333334	7.4465	7.83051
12 h after light	7.540523333333333	7.472389999999999	7.5991
4 h after dark	7.01575	6.6006100000000005	7.2525699999999995
8 h after dark	7.26265	7.10918	7.4824399999999995
12 h after dark	6.885813333333333	6.498819999999999	7.1470199999999995