condition	mean	min	max
4 h after light	8.219793333333334	8.121960000000001	8.337639999999999
8 h after light	8.30821	8.1623	8.40873
12 h after light	8.33134	8.16493	8.44846
4 h after dark	8.356103333333333	8.351519999999999	8.3628
8 h after dark	8.486316666666667	8.32441	8.72218
12 h after dark	8.49459	8.38658	8.642619999999999