condition	mean	min	max
4 h after light	8.839636666666667	8.7679	8.932030000000001
8 h after light	8.92227	8.85304	9.05505
12 h after light	8.951653333333333	8.7625	9.113489999999999
4 h after dark	8.883849999999999	8.66049	9.058589999999999
8 h after dark	8.84314	8.83232	8.859010000000001
12 h after dark	8.79758	8.73585	8.83567