condition	mean	min	max
4 h after light	8.519536666666667	8.46278	8.5537
8 h after light	8.431113333333334	8.16324	8.59913
12 h after light	8.227403333333333	8.182269999999999	8.313089999999999
4 h after dark	8.25909	7.813960000000001	8.63698
8 h after dark	8.334106666666667	8.015939999999999	8.590010000000001
12 h after dark	8.04916	7.7957	8.25491