condition	mean	min	max
4 h after light	8.346256666666667	8.140130000000001	8.52781
8 h after light	8.39384	8.16879	8.57207
12 h after light	8.390733333333333	8.11769	8.53778
4 h after dark	8.396556666666665	8.18878	8.65777
8 h after dark	8.266093333333334	8.10725	8.44812
12 h after dark	8.152519999999999	7.74862	8.38686