condition	mean	min	max
4 h after light	8.50388	8.40134	8.623330000000001
8 h after light	9.06141	8.881860000000001	9.18328
12 h after light	9.357546666666668	9.08253	9.57956
4 h after dark	8.90714	8.76313	9.18425
8 h after dark	8.779363333333333	8.64189	8.96567
12 h after dark	8.212866666666667	7.87823	8.39427