condition	mean	min	max
4 h after light	8.64677	8.521410000000001	8.80845
8 h after light	8.818213333333334	8.68097	9.08291
12 h after light	8.894093333333334	8.78303	9.036610000000001
4 h after dark	8.743533333333334	8.48887	8.904919999999999
8 h after dark	8.607363333333334	8.524410000000001	8.68073
12 h after dark	8.72333	8.54358	8.9563