condition	mean	min	max
4 h after light	8.696026666666667	8.49405	8.88313
8 h after light	8.86508	8.4491	9.287980000000001
12 h after light	8.765073333333333	8.46485	9.23327
4 h after dark	8.80814	8.46113	9.29377
8 h after dark	8.854733333333334	8.462480000000001	9.30095
12 h after dark	8.69616	8.66135	8.71692