condition	mean	min	max
4 h after light	8.861603333333333	8.55449	9.03529
8 h after light	8.939883333333333	8.58557	9.163789999999999
12 h after light	8.998123333333334	8.761660000000001	9.213239999999999
4 h after dark	9.120756666666667	8.70963	9.45754
8 h after dark	9.06758	8.80621	9.379769999999999
12 h after dark	8.900406666666665	8.6245	9.053519999999999