condition	mean	min	max
4 h after light	8.513446666666667	8.4952	8.52554
8 h after light	8.589459999999999	8.374319999999999	8.71544
12 h after light	8.635483333333333	8.36289	8.78787
4 h after dark	8.379346666666667	8.223519999999999	8.51189
8 h after dark	8.194176666666667	8.14471	8.2256
12 h after dark	8.17666	8.09425	8.31683