condition	mean	min	max
4 h after light	8.093036666666666	7.775860000000001	8.307
8 h after light	8.19894	7.9752	8.335230000000001
12 h after light	8.38366	8.1261	8.56757
4 h after dark	8.596373333333334	8.3159	8.75004
8 h after dark	8.576013333333334	8.333860000000001	8.81299
12 h after dark	8.797826666666667	8.617560000000001	8.923739999999999