condition	mean	min	max
4 h after light	8.722045	6.90369	10.5404
8 h after light	6.939635	6.40487	7.4744
12 h after light	8.024735	7.22072	8.82875
4 h after dark	8.374305	8.11224	8.63637
8 h after dark	10.23335	10.228	10.2387
12 h after dark	9.507065	9.46671	9.54742