condition	mean	min	max
4 h after light	8.419450000000001	8.21236	8.593630000000001
8 h after light	8.09211	7.87208	8.25455
12 h after light	7.810623333333333	7.633030000000001	7.9767399999999995
4 h after dark	8.599376666666666	8.40095	8.80585
8 h after dark	8.753506666666667	8.61197	8.91997
12 h after dark	8.943816666666667	8.81355	9.055060000000001