condition	mean	min	max
4 h after light	8.0109075	7.820455	8.20136
8 h after light	6.858335	6.512962	7.203708
12 h after light	7.352416	6.930219	7.774613
4 h after dark	7.2914265	7.170581	7.412272
8 h after dark	7.4131745	7.400055	7.426294
12 h after dark	6.94727	6.94727	6.94727