condition	mean	min	max
4 h after light	6.44445	6.27498	6.56959
8 h after light	6.632066666666667	6.49545	6.84267
12 h after light	6.860133333333334	6.704560000000001	6.9722
4 h after dark	6.852480000000001	6.7221	6.971260000000001
8 h after dark	6.52815	6.40811	6.69837
12 h after dark	6.255513333333333	6.19837	6.34169