condition	mean	min	max
4 h after light	8.509466666666667	8.44586	8.57762
8 h after light	8.561393333333333	8.50202	8.64231
12 h after light	8.74909	8.648810000000001	8.82638
4 h after dark	8.99433	8.93839	9.029910000000001
8 h after dark	9.351373333333333	9.22867	9.506039999999999
12 h after dark	9.20852	9.1366	9.2898